milicosmic.blogg.se - Backblaze mojave

Backblaze mojave for mac os x#
Backblaze mojave mac os x#
Backblaze mojave pro#
Backblaze mojave free#

Apple silicon Macs don’t need their startup security to be changed to allow them to boot from an external disk, but if damage to internal storage is sufficiently severe to make Recovery Mode unavailable, they’re unlikely to be able to get far enough into the boot process to start up from an external disk.

Unless that’s done before the problem occurs, the external bootable disk is useless.

On Macs with a T2 chip, it can only be used if you have already downgraded that Mac’s startup security to allow it to boot from an external disk.On Intel Macs without a T2 chip, it can be used as normal, as a complete substitute for bootable internal storage.Initially Apple put the M1’s primary Recovery system in a hidden container on the internal storage, then in Monterey it moved to another volume in that boot volume group, with the hidden container used for fallback, in place of Remote Recovery.Īssuming you’re able to clone your Mac’s internal storage to act as an external bootable volume, how could you use that instead of Recovery Mode? The latter have to start their boot process from their internal SSD, even when starting up from an external disk. With Big Sur, cloning all but ground to a halt: first, the only method to perform that, asr, suffered a serious bug and didn’t work, then it became clear that the complexities of the boot volume group made cloning inherently less reliable.Īt the same time, Recovery Mode improved considerably, as it had to for Apple silicon Macs. Apple provided Remote Recovery, but that was so ponderously slow that it couldn’t replace the second bootable disk.įrom High Sierra through to Mojave, changes brought by the introduction of APFS made the second boot disk just as attractive, but Catalina went all complicated, with its more elaborate volume layout. 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.

Backblaze mojave free#

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.

Backblaze mojave pro#

Those with Macs with multiple internal disk bays, like the Mac Pro and its predecessors, frequently cloned volumes and whole disks.

Backblaze mojave mac os x#

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.

Backblaze mojave for mac os x#

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.