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- #Techtool pro 14 mac os x#
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The other is to provide a fallback macOS known to work, in the event that the upgraded macOS has problems that can’t be solved. Apple has improved those available in Recovery, and the most important third-party disk utilities simply aren’t available for APFS, as Apple still hasn’t provided developers with sufficient information to enable their development.
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One is to add your own tools to supplement those provided in Recovery Mode, for example a copy of Disk Warrior to enable rebuilding the directory structures of an HFS+ volume, or TechTool Pro for its hardware tests and other tools. There are two other good reasons for wanting to build a cloned external bootable volume.
That had the added bonus that you could then use the intermediate disk in an emergency, when your regular boot disk suffered problems.įrom Lion to Sierra, Recovery Mode was a bonus, but because Recovery depended on a hidden HFS+ volume on the same disk, it was vulnerable to many of the same problems as the system volume on that disk.
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Because those were rotating hard disks and vulnerable to fragmentation, one simple way to defragment all your files and free space was to clone a volume from one disk to another, and back again. Those with Macs with multiple internal disk bays, like the Mac Pro and its predecessors, frequently cloned volumes and whole disks.
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Long before Apple came up with Recovery Mode in Mac OS X Lion 10.7 in July 2011, there were only two practical options for tackling serious problems: single-user mode (SUM), or another bootable disk.
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The first version of Mike Bombich’s Carbon Copy Cloner in January 2002, for Mac OS X 10.1 Puma, changed that.
Prior to that, it was usually easy enough to copy the System and other supporting files when necessary. If you can’t reliably clone your current system, what options are there?Ĭloning Mac systems didn’t really start in earnest until the release of Mac OS X. One question that has arisen is how best to make an external bootable disk in preparation.
Now we’re into October, all eyes are on Ventura, promised for release in the next four weeks, assuming Apple doesn’t make it a special Hallowe’en edition.