- If you're preparing a Mac for resale or troubleshooting a misbehaving machine, you might opt to format your Mac's hard drive. Here's a look at how to use Disk Utility to perform this function. The information in this article applies to Disk Utility on systems with macOS Catalina, Mojave, High Sierra, and Sierra, as well as OS X El Capitan.
- Keep in mind that a MAC can generally read other file formats, but for the best performance and to create a bootable disk, formatting exclusively for MAC is required. Part 1: Which File Format You Should Choose? Before you begin formatting the drive, there are a few things to do. The most important, you should decide which format to use.
To do that, the only thing you need is a bit of precise syntax to make sure that you are erasing the proper disk. Here I'll show you how you can erase and format a disk using the command line. Working with Terminal Start off by running the following command in the command line: Diskutil list This is going to list all the mounted drives on your Mac. To format external hard drives on Mac, you'll need the built-in disk management tool called Disk Utility. Then, you need to choose the best file system for your external hard drive when erase it. Tips: Remember to back up the files on the external hard drive if you have saved anything important on it.
Hello and welcome to my User Tip
As people begin to sell their used Intel processor Mac's problems are occurring when the new owner wishes to wipe everything and make the machine their own due to complexity of reinstalling various OS X versions, AppleID conflicts etc, so I will attempt to clear up the issue and provide concrete procedures you need to follow.
The previous owner is supposed to remove any firmware passwords, erase everything and reinstall the OS X version that came with the machine or OS X 10.6 (if the machine originally came with 10.6, 10.5 or 10.4), but usually this doesn't occur and when the new owner goes to update OS X or reinstall the OS, they are blocked in some manner.
This User Tip is designed to cover Intel Mac's, older PPC processor based Mac's came with their own OS X disks or 10.5 upgrade disks and that's the last OS X version that can run on those machines. 10.5 is currently not supported for security issues etc., so if your using this, use it off the Internet.
OS X boot drives formatting
All OS X boot drives must be formatted in Apple's Disk Utility (as minimal) 1 Partition: Option: GUID and OS X Extended Journaled as the format.
All OS X boot hard drives (not Solid State Disks) should be futher erased with the Security Option: Zero All Data or move the slider one spot to the right, this has a effect of wiping all data off the drive and also eliminates bad sector issues that can prevent a drive from formatting or even installing OS X. It does take some time to complete but it's worth it to prevent drive issues later. If the drive fails the zero erase procedure, it's bad and requires replacement. Be glad to know it now than later on and takes your data with it.
If you require more complicated behind the scenes action then read these
Identifying the machine
First off if the machine is bootable to OS X, head to the Apple Menu > About This Mac and note the OS X version.
Then do > More Information and write down all what you see there.
What is important is the Model Identifier, the Serial Number and the Memory, get all this written down.
If the machine is not booting into OS X, then you will have to work from the Serial Number located on the outside of the machine or box someplace.
This Apple support document will assist you getting the Serial Number: https://support.apple.com/kb/HT1349
If the machine is hold Command(⌘) r booting into RecoveryHD, or hold Command(⌘) Option/alt r booting into Internet Recovery (connected via Ethernet to router/modem (wired or built in keyboard needed for at boot key commands)
Then use Terminal and enter this command followed by the return/enter. With OS X being tied to a previous owners ID, you likely can't reinstall it.
ioreg -l | grep IOPlatformSerialNumber
Another method to get the profile of the machine is to use Apple's Hardware Test, which in some cases will provide Model Identifier and Serial Number as well as a host of other data about the machine, like the RAM etc. Apple also has links to identify the machine.
Newer machines download Hardware Test from Apple via the Internet, so connect a Ethernet cable (preferred) and press and hold the D key and boot the machine.
If your required to hold the D key down at boot, it takes awhile, so hold on for about 5-7 minutes.
You can try this to see if it works, no big deal if it doesn't, just see the link above and see if older Hardware Test versions will give you the reqired machine information.
This website will assist you in identifying the Model Identifier based upon the last 3 or 4 digits of the Serial Number.
The Model Indentifier looks like 'MacBook Pro 4,1' or similar.
You can also use the following Apple resources for assistance identifying your Mac NoteBook or Desktop:
To determine what OS your Mac NoteBook or Desktop shipped with you can use Mac OS X versions (builds) for computers.
Ok, at this point you should have the Serial Number and the Model Identifier at least.
Wired or built in keyboard needed
If the machine has a built in keyboard (laptops) then your ok, just use that. If the machine has a wireless keyboard, you will need to connect a wired one to proceed further.
A PC keyboard should work, the Windows key is the same as the Apple/Command Key and the option/alt is the same as well.
From now on, use the wired keyboard until your back setup on OS X and can establish a new wireless keyboard.
Checking for a Firmware Password
We need to check to see if a Firmware Password has been set on the used machine.
You can do this by holding Command⌘ V and booting the machine. What will occur differently when OS X is booting is you will see a black screen with a bunch of white text scrolling down and then presented by the log in screen or logging in as normal like before.
If your instead presented with a lock symbol and a request for a password, the a firmware password has been set and needs to be removed first before you can proceed.
You will need the firmware password to remove it, it's the ultimate lock down of a Mac designed for schools and security purposes. However it can be bypassed.
I recommend at this point you take the machine to a local Apple repair or store and have them reset the machine, as it involves doing internal work. Also you might want to take this opportunity to have them check the RAM amount and install more to max the machine of it's capacity to hold RAM, as it will perform better.
As a extra caution, I would bring receipts and proof of purchase of the used machine, because to Apple it technically belongs to another person on their records.
At this point there is no Firmware Password or it has been removed so the at boot key commands will work.
Last chance to backup any files
I do NOT advise TimeMachine being your only copy of your precious users files, make a copy of files to a normal regular external drive.
The reasons for this is TM is designed to restore the current machine owner, and if you come to find out it's all tied to the previous owner, your going to change that and thus may have troubles with TM.
So just having your user files on a external drive you can recover just those in your new setup.
Disconnect all drives when messing around with Disk Utility and OS X reinstalls to prevent TM from activating and making mistakes.
The quickest way to determine what you can do
Hold the Command⌘ Option r keys down using a wired or built in keyboard and boot the machine on a fast, reliable Internet connection using a Ethernet cable to your router (preferred) or connect using Wifi.
If you load Internet Recovery, then use that Disk Utility to erase the ENTIRE drive of all partitions, check under Partitions that the Partition: 1, Option: GUID and OS X Extended Journaled as the format, give it a name MacintoshHD and apply.
Quit Disk Utility from the file menu and install OS X using your AppleID and password.
This is the tester, if your AppleID and password is accepted and OS X begins installing, then your good to go.
You can upgrade to a later OS X version in AppStore or by calling Apple for the latest OS X version for that machine, they will send you a installer link.
If it doesn't install, it means that OS X version was purchased by the previous owner, you will need the 10.6 install disks.
More complicated OS X installs
Because OS X 10.7 (and up) upgrades are tied to a purchaser, like AppStore software is, they cannot be updated or reinstalled by another owner with a different AppleID and password.
Below is the lowdown on the more complicated OS X installs when Apple transitioned from boot disks to Internet only installs of OS X
If the machine was upgraded from OS X version 10.6.8 to 10.7:
Then using Internet Recovery (if the machine is capable of it) will restore OS X 10.7 as also will Recovery HD partition on the boot drive.
Only the original purchaser of 10.7 from the AppStore can reinstall OS X 10.7 using their AppleID and password.
Other owners will have to reinstall OS X 10.6 first via the appropriate 10.6 install disks, then can upgrade to the latest OS X version the machine supports via AppStore, or by calling Apple and ordering one of the later versions the machine supports and receiving a link to the download
If the machine was upgraded from OS X version 10.6.8 to 10.8:
Then using Internet Recovery (if the machine is capable of it) will restore 10.8 as also will Recovery HD partition on the boot drive.
Only the original purchaser of 10.8 from the AppStore can reinstall OS X 10.8 using their AppleID and password. How remove presets adobe premiere mac.
Other owners will have to reinstall OS X 10.6 first via the appropriate 10.6 install disks, then can upgrade to the latest OS X version the machine supports via AppStore, or by calling Apple and ordering one of the later versions the machine supports and receiving a link to the download.
If the machine was upgraded from OS X version 10.6.8 to 10.7, then from 10.7 to 10.8:
Then using Internet Recovery (if the machine is capable of it) will restore 10.7 and Recovery HD partition on the boot drive will restore 10.8.
Only the original purchaser of 10.7 from the AppStore can reinstall OS X 10.7 using their AppleID and password.
Avatrade mt4 mac.
Only the original purchaser of 10.8 from the AppStore can reinstall OS X 10.8 using their AppleID and password.
Other owners will have to reinstall OS X 10.6 first via the appropriate 10.6 install disks, then can upgrade to the latest OS X version the machine supports via AppStore, or by calling Apple and ordering one of the later versions the machine supports and receiving a link to the download.
If the machine came with OS X 10.7 installed from the factory and upgraded to 10.8:
Then using Internet Recovery will restore 10.7 and Recovery HD partition will restore 10.8
Any owner can install 10.7 from Internet Recovery, but a AppleID and password is required.
Only the original purchaser of 10.8 from the AppStore can reinstall OS X 10.8 using their AppleID and password.
Other owners will have to reinstall OS X 10.7 first via Internet Recovery, then can upgrade to the latest OS X version the machine supports via AppStore, or by calling Apple and ordering one of the later versions the machine supports and receiving a link to the download.
At this point there is no Firmware Password or it has been removed so the at boot key commands will work.
Last chance to backup any files
I do NOT advise TimeMachine being your only copy of your precious users files, make a copy of files to a normal regular external drive.
The reasons for this is TM is designed to restore the current machine owner, and if you come to find out it's all tied to the previous owner, your going to change that and thus may have troubles with TM.
So just having your user files on a external drive you can recover just those in your new setup.
Disconnect all drives when messing around with Disk Utility and OS X reinstalls to prevent TM from activating and making mistakes.
The quickest way to determine what you can do
Hold the Command⌘ Option r keys down using a wired or built in keyboard and boot the machine on a fast, reliable Internet connection using a Ethernet cable to your router (preferred) or connect using Wifi.
If you load Internet Recovery, then use that Disk Utility to erase the ENTIRE drive of all partitions, check under Partitions that the Partition: 1, Option: GUID and OS X Extended Journaled as the format, give it a name MacintoshHD and apply.
Quit Disk Utility from the file menu and install OS X using your AppleID and password.
This is the tester, if your AppleID and password is accepted and OS X begins installing, then your good to go.
You can upgrade to a later OS X version in AppStore or by calling Apple for the latest OS X version for that machine, they will send you a installer link.
If it doesn't install, it means that OS X version was purchased by the previous owner, you will need the 10.6 install disks.
More complicated OS X installs
Because OS X 10.7 (and up) upgrades are tied to a purchaser, like AppStore software is, they cannot be updated or reinstalled by another owner with a different AppleID and password.
Below is the lowdown on the more complicated OS X installs when Apple transitioned from boot disks to Internet only installs of OS X
If the machine was upgraded from OS X version 10.6.8 to 10.7:
Then using Internet Recovery (if the machine is capable of it) will restore OS X 10.7 as also will Recovery HD partition on the boot drive.
Only the original purchaser of 10.7 from the AppStore can reinstall OS X 10.7 using their AppleID and password.
Other owners will have to reinstall OS X 10.6 first via the appropriate 10.6 install disks, then can upgrade to the latest OS X version the machine supports via AppStore, or by calling Apple and ordering one of the later versions the machine supports and receiving a link to the download
If the machine was upgraded from OS X version 10.6.8 to 10.8:
Then using Internet Recovery (if the machine is capable of it) will restore 10.8 as also will Recovery HD partition on the boot drive.
Only the original purchaser of 10.8 from the AppStore can reinstall OS X 10.8 using their AppleID and password. How remove presets adobe premiere mac.
Other owners will have to reinstall OS X 10.6 first via the appropriate 10.6 install disks, then can upgrade to the latest OS X version the machine supports via AppStore, or by calling Apple and ordering one of the later versions the machine supports and receiving a link to the download.
If the machine was upgraded from OS X version 10.6.8 to 10.7, then from 10.7 to 10.8:
Then using Internet Recovery (if the machine is capable of it) will restore 10.7 and Recovery HD partition on the boot drive will restore 10.8.
Only the original purchaser of 10.7 from the AppStore can reinstall OS X 10.7 using their AppleID and password.
Avatrade mt4 mac.
Only the original purchaser of 10.8 from the AppStore can reinstall OS X 10.8 using their AppleID and password.
Other owners will have to reinstall OS X 10.6 first via the appropriate 10.6 install disks, then can upgrade to the latest OS X version the machine supports via AppStore, or by calling Apple and ordering one of the later versions the machine supports and receiving a link to the download.
If the machine came with OS X 10.7 installed from the factory and upgraded to 10.8:
Then using Internet Recovery will restore 10.7 and Recovery HD partition will restore 10.8
Any owner can install 10.7 from Internet Recovery, but a AppleID and password is required.
Only the original purchaser of 10.8 from the AppStore can reinstall OS X 10.8 using their AppleID and password.
Other owners will have to reinstall OS X 10.7 first via Internet Recovery, then can upgrade to the latest OS X version the machine supports via AppStore, or by calling Apple and ordering one of the later versions the machine supports and receiving a link to the download.
The following machines are capable of installing OS X 10.6:
All Intel processor Mac's prior to 2011 will install OS X 10.6 with the 10.6.3 white retail disks sold online provided the machine originally came from the factory installed with OS X 10.6.2 or earlier.
All Intel processors Mac's prior to 2011 and released with OS X 10.6.3 or later originally installed from the factory require model specific install disks only attained by directly calling Apple and ordering them.
All Mac's sold new after January 2011 until apx July 20, 2011 (when OS X 10.7 was released) require model specific OS X 10.6 (10.6.3+) install disks that can only be attained by calling Apple directly.
Nearly all Mac's sold after July 20, 2011 came with factory installs of OS X 10.7, the firmware will refuse to boot off the 10.6 disks even if they are the model specific ones, however if OS X 10.6 can be put on the drive via Firewire Target Disk mode or removing the drive and using another Mac, then the Mac will boot from it.
How to find out what OS X 10.6 disks to use:
If your unsure of what OS X install disks will work, you can use the Model Indentifier (ex: MacBook Pro 4,2) to consult the free MacTracker as to find out what OS X version originally shipped on that machine (not perfect for 2011) or call Apple and provide the machines serial number.
The machines serial number or model identifier can be located in software or outside the machine: https://support.apple.com/kb/HT1349
Or if you have the machine connected to a Internet you can boot the machine while holding D down for about 7 minutes to load Hardware Test which has a pane at the top to select and provides the information.
How to erase and install OS X 10.6:
Make sure to erase the ENTIRE drive by selecting the drive makers name and disk size at the top, it's so the hidden partitions of later OS X versions are totally erased, thus if you decide to upgrade to later OS X versions via AppStore, they will install the hidden partitions more appropriate for you.
Also if you want to stick with Snow Leopard, the 10.6 install disk version of Disk Utility will be able to properly repair the drive if need be.
More information:
Any non-Internet Recovery capable machines with a new or completely erased boot drive (thus no RecoveryHD partition) will need the appropriate 10.6 install disks or USB thumb drive.
Internet installs of OS X require a fast, reliable, stable and no data capped/restricted size download capability.
All OS X 10.6 disks contain the entire operating system, despite their capability of appearing to upgrade older OS X versions of 10.4/10.5, rather what occurs is the older version is replaced in favor of the newer one, users accounts, files and most programs are left intact.
All OS X AppStore upgrades are also the same, they replace the older version with the newer one, leaving user accounts and most programs intact.
How To Format A Disk On Mac
OS X 10.6 white retail disks don't contain the free iLife suite that is on the model specific OS X install disk versions.
iLife can be reinstalled from the OS X 10.6, 10.5 and 10.4 disks or extracted using Pacifist from CharlesSoft, Software Update to bring them current
Free iLife that came on factory installs of OS X 10.7 and up also can be restored if they are not tied to a particular AppleID yet, this occurs if a person buys a 'open box' and the previous customer has returned the machine, the store will wipe the drive of all data, can reinstall OS X from Internet Recovery, but can't reinstall the free iLife. As long as the previous customer didn't accept it in AppStore, it can be reinstalled on the machine by the next owner.
Good Luck 🙂
You might know how to format an iPhone, but do you know how to format a DVD-RW? Stands for 'Digital Versatile Disk Rewritable.' A DVD-RW is like a DVD-R but can be erased and written to again. Like CD-RWs, DVD-RWs must be erased in order for new data to be added. DVD-RWs can hold 4.7GB of data and do not come in double-layered or double-sided versions like DVD-Rs do. Because of their large capacity and ability to be used multiple times, DVD-RW discs are a great solution for frequent backups. So today we will talk about how to format DVD-RW on Mac and how to rewrite it as well.
Preparation: What you need to know to format DVD-RW on a Mac
Before formatting DVD-RW, you need to know what DVD-RW is and what you need to format DVD-RW. So let's first take a look at the DVD-RW, then we have detailed solution to show you how to format a DVD-RW on Mac.
As introduced above, a DVD-RW is a disc that can be erased in order to rewrite. To record data onto a DVD-RW disc, you'll need a DVD burner that supports the DVD-RW format. Once a DVD-RW is formatted, you can use it again just like a new disc. Keep in mind that rewritable discs have a limited life. It is probably not a good idea to use them for long term file archiving, and you should never erase and reuse them more than about 100 times.
But before writing data onto a new, blank disc, you must first format it. Mac allows you to do this without the need to install a third-party utility. Every Mac made today can burn DVD-RW discs, and if your Mac has a SuperDrive, you can burn DVD-RW discs, too. The problem with reusing a rewritable DVD is that Apple didn't exactly make it easy to figure out.
Part 1: How to format DVD-RW on a Mac
If you want to know exactly how to format a DVD-RW on Mac so that you can reuse it for other data, here is what to do:
Step 1. Place the DVD-RW you want to format into your Mac. If there are any files you want to keep that are on the disc, be sure to copy them to your hard drive.
Step 2. Launch Disk Utility. It is in Applications > Utilities > Disk Utility.
Format Hard Drive For Mac
Step 3. Select the DVD you want to format in the column on the left.
Step 4. Click the Erase tab. The Quick Erase box is checked by default. Using Quick Erase to prepare the disc for reuse takes less time.
Format Disk Mac Os X
Step 5. Click the Erase button to format the DVD-RW. Once this process finalizes you will have a clean DVD-RW ready to write on.
Part 3: How to rewrite DVD-RW on a Mac (Leawo DVD Creator for Mac)
After formatting the DVD-RW, then you will have the need to burn the new files into the DVD disc again. Concerning the DVD burning process, you have to use a third-party burning program. Leawo DVD Creator for Mac is highly recommended as your firm choice due to its powerful features in burning DVD and customized disc menu.
DVD Creator
☉ Convert videos like MP4, AVI, MKV to DVD format fast.
☉ Create DVD-5, DVD-9 disc, folder or ISO image without quality loss.
☉ 1-click operation to create photo slideshows and burn to DVD.
☉ Easily editable effects, 2D to 3D conversion support.
☉ Built-in menu templates and edit disc menu with personal preferences.
Step 1. Load video files
You can either add single video file or a video folder to this Mac DVD Creator. You can also drag the video file you need to add video files. After loading videos, at the bottom, select to burn video to DVD-5 or DVD-9 and choose a suitable aspect ratio 4:3 or 16:9. Also, you can choose the burning speed (fit to disc/2/3/5/7/9 Mbps). Space needed for DVD burning can be accessed here.
Step 2. DVD Creator Mac program settings
In the menu bar, navigate to the 'Preferences' option to do program settings upon burning:
'General': Select a program language from preset UI languages.
'Conversion': Enable Priority native codec or not.
'Burn': Choose default DVD video mode from NTSC and PAL, according to the place you locate.
'Others': Add external subtitle, choose encoding, choose thumbnail (screenshot) location and format.
Step 3 Video to DVD burning settings
Click the big green 'Burn' button to call out the burning setting sidebar, where you could set Burn to, Disc Label and Save to options. The 'Burn to' option allows multiple choices. To burn video to DVD disc on Mac, you need to insert a blank writable DVD disc into the disc recorder drive, and then select it as target under the 'Burn to' option.
Step. 4 Burn video to DVD
Mac 2009 sierra. After you inserted a blank DVD disc to your DVD drive, chose path to save to, and typed the disc labeled, start to burn video to DVD on Mac by clicking on the 'Burn' button. Then it will start video to DVD creation.
Leawo DVD Creator can burn DVD from more than 180+ formats of videos and photos with 6X faster speed. Additionally, it can allow you to experience all kinds of DVD menu templates for free and you can edit your video according to your own preference. Besides, you can freely choose subtitles and audio tracks as well as preview changes in the video instantly and screenshot taking.
Conclusion
All the solution above are good ways to help you figure out the problem that how to format a DVD-RW on Mac. Remember that you have to make sure your DVD disc is the type that can be rewritten and read. You can erase the DVD disc freely and you can also rewrite the new files into the DVD disc again with the help of powerful Leawo DVD Creator.
