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It’s also a good idea to do a backup before you install any new system software in case something goes wrong in the installation so you can go back to what it was when you backed up. The most important thing about backing up is to do it regularly. This makes sure your OS X is functioning well before you back it up, otherwise there can be some problems. It’s good to select ‘Repair permissions before copying in the options tab, see below. Press copy now, go and have a cup of coffee while you wait for it to copy all your files, perhaps up to an hour or so. Select your Macintosh HD in the left menu, select your new firewire drive in the right one, select ‘backup – all files’.
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It’s free to be able to do a basic backup, or you can pay if you want extra features such as incremental backup (it’s faster, but the end result is the same).

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Go to and download the latest version of SuperSooper. It will now erase and format your external Hard Drive ready for use and call it Backup. Now in the Erase tab check it says ‘Mac OS Extended (Journaled)’ as below, type in the name you would like to call it e.g. If it doesn’t go to the partition tab, choose ‘1 Partition’ choose ‘options’, and make sure it is set to ‘GUID Partition Table’ then ‘Apply’. Select your new Hard Drive in the left pane.īefore you format it, check in the bottom right of the window that it says “ Partition Map Scheme : GUID Partition Table”. Run Disk Utility (in your Applications/Utilities folder). This way you will always fit your backup on the external drive. Eg if you have an 200G hard drive on your imac, you should get at least an 200G for your backups. You need an external hard drive at least as big as the hard drive on the computer you are intending to back up.

Now let me explain those steps in more detail.
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If you want to use Time Machine as well, here’s an article on how to backup using time-machine. This article describes how to manually backing up using Super Duper. I have time-machine running so my most recent work is always backed up, and I do a CCC backup monthly so I have an instant bootable backup ready to go for emergencies. The downside it it will only take you back to THE LAST TIME YOU BACKED UP. In an emergency you can plug in your backup and be running from it under a minute. That means if you plug your backup drive in, and then hold down Option-Command-Shift-Delete during startup, you can boot instantly off your backup drive. The second method takes a few steps longer to set up, but your backup will be bootable. But it will get your computer back to what it was like the hour before it crashed! This process can take hours – not good if you are just heading out the door and need a file. So if your computer crashes you need to insert the original DVD and restore from the Time Machine backup. The big disadvantage is that the backup is not bootable. It doesn’t rely on you remembering to do anything. Look here.Īpple’s way (Time Machine) is a lot simpler. If you are a beginner I recommend Time Machine. Manually backup your computer with some other software such as Super Duper or Carbon Copy Cloner. Use Time Machine to automatically backup. SuperDuper v3.5 beta 1 can be downloaded here.There are two main ways to backup your Apple computer.ġ. So it’s not a problem to move from Intel to M1 or vice versa. Regardless of processor, you can still restore using Apple’s “first boot” restore process, or by using Migration Assistant.
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You can, however, boot an M1 Mac from a backup of a different M1 Mac, once you’ve authorized it with a user on the Mac you’re booting. The team behind SuperDuper don’t know the details but say “I’m certain it required changes to the M1’s startup process and to asr to finally make it happen.”Īs indicated above, you can’t boot an Intel Mac from an M1 backup or vice-versa.

It would copy the System volume but displayed errors like the “source volume format is not yet supported.”Īpple is fixing this in macOS 11.4. But asr doesn’t work properly with M1 Macs. This is due to a change that Apple is bringing to the Mac.įor security reasons, Big Sur forced the use of Apple Software Restore, or asr, for backups that contain a System volume (that is, any startup volume). However, you won’t be able to boot from a SuperDuper backup unless you’re running the macOS 11.4 beta or later.
