- #Can i revert back high sierra macbook air install
- #Can i revert back high sierra macbook air password
This is the result of the booter being unable to find IOAESAccelerator, and can only be resolved by shutting down, disconnecting the external disk, starting up in 1TR, and setting it to start up from the internal boot disk again.
If you do try this, you’re likely to find that your Mac gets stuck in a boot loop because of a kernel panic. Unfortunately, as I’ll describe in a separate article, once your Mac has been updated to 11.2, it appears impossible to boot it from an external disk with 11.1 installed, presumably because of firmware incompatibility.
#Can i revert back high sierra macbook air install
Instead, when you do try to select a Time Machine backup – assuming that one is accessible – you’re told to install macOS instead, which of course will merely deliver 11.2 again.Īlthough I’m not sure how this might help you revert your internal disk to 11.1, it might at least give you a way of restoring access to whatever broke in the update to 11.2. However, at present neither the macOS installer nor Time Machine keeps snapshots of the System volume which you can restore using this method. The snapshot should then be restored, and your Mac will reboot from that version of macOS. A dialog should then invite you to install that version of macOS, which you would accept. To revert to the previous version of macOS, select the last snapshot containing that version, then click Continue. Then select the backup which you wish to restore. To restore from a previous backup, select your backup disk and click Continue. Time Machine System Restore will then list Restore Sources.
#Can i revert back high sierra macbook air password
Enter your password in the dialog, select Restore from Time Machine and click Continue. In the macOS Recovery window select your user icon and click Next. Select the Options icon, then click Continue underneath it. This takes you to the Startup Options screen. To try this, press and hold the Power button until the display shows Loading Startup Options, then release it. So what strategies might be open to you if you need to revert to 11.1?Īccording to these instructions given by SoftRAID, you can enter 1 True Recovery (1TR) and revert to a previous Time Machine snapshot of 11.1. Neither of my updated M1 Macs has any trace of a snapshot of the 11.1 System volume, now that they’ve been updated to 11.2.
The only snag with those accounts is that it doesn’t appear to be true. If that happens to contain your backups, then your Mac is in trouble.īut no worries: according to many accounts, all you have to do is to restore your internal disk to 11.1 using a snapshot. Those who rely on SoftRAID to access an external RAID system are among the most obvious, as the current release of SoftRAID is incompatible with 11.2, and lost all access to any disk requiring it.
Quite a few users who updated their M1 Macs to Big Sur 11.2 recently are regretting having done so.