Heres how to create a bootable backup disk and save yourself some time.But before you do anything else, a word of caution: once youve used the OS X installer, it will automatically delete the file you need to make the backup disk, so youll want to either make a copy of the installer or create your disk before you upgrade.You can use a USB flash drive, external hard drive, or DVD-R disc, but the USB drive is quicker.
Hacked Disc Image Mac OS ExtendedIf youre using a USB drive, it has to be formatted as Mac OS Extended (Journaled) and set to partition type GUID Partition Table in order to work.
![]() Hacked Disc Image How To Create AImage via arstechnica.net You can find out more on how to do this here. Hacked Disc Image Download The AppImage via arstechnica.net Simply download the app and in a few clicks (and about 30 minutes) your disk will be finished. Click on Show Package Contents and then find the folder called Shared Support. Image via arstechnica.net Once inside, browse to the Contents SharedSupport folder where there will be a file called InstallESD.dmg. ![]() Get a lifetime subscription to VPN Unlimited for all your devices with a one-time purchase from the new Gadget Hacks Shop, and watch Hulu or Netflix without regional restrictions. However it appears that this has no effect on the restore, and the USB is usable afterwards. Weve seen it too on some Macs, but as you say, it still works just fine. Start holding it before you see the apple logo, and keep holding until you see the list of bootable drives.
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