Right now, ASR will only copy whole volume groups (System and Data) we can't choose to copy just the System volume. That volume can only be copied using Apple's proprietary APFS replication utility ("ASR"). Starting in macOS Big Sur, the system now resides on a cryptographically sealed "Signed System Volume"(link is external) If one has made a Bootable Clone via SuperDuper or for that matter Carbon Copy Cloner softwares -įrom CCC trouble Shooting and may or may not also apply to SuperduperĬCC will not update the System volume on a Legacy bootable copy of the startup disk (Big Sur and later) Yes they can be used from Booting the Computer into Recovery Mode and used to Restore but not a directly Bootable Drive from a Cold Boot. Maybe I am parsing your words and apologize for that.īut a Backup Drive implies the drive as used for Time Machine Backup.ĪFAIK - Time Machine Backup Drives are Not Bootable. I am trying to attach it as a report now. I have tried to include an Etrecheck that I just did, but apparently it's too long. Google Backup and Sync NEVER stops - even if I have not used my computer for 4 days! Google says that's normal. Apple (phone) and the Apple store claim that the HD has no problem and that the external backup "must have been the problem." I have a different external backup and I am still having issues. The install was done manually because Time Machine also failed and became unavailable except through copying individual files over - over the course of a couple of weeks. I DO know that I have reinstalled all my software after wiping my HD clean because of adware and other issues. Mac crashes after Mojave 10.14.4 update & reinstall Each time I come back to my Mac after screensaver has been initiated and then the computer sleeps, I get a message that states that my computer has restarted due to a problem. I guess I'm wondering if it is worth it to try reformatting and going that route - but if it is other hardware causing it, that could just be a waste of time. Weired that it was okay that one time to do the backup. I'm thinking it must be hardware - perhaps hard drive failing to load things fast enough (although disk repair showed it as okay). However, once finished and I tried to open a program - spinning beachball - and that's all I get again when I turn off and reboot. I plugged in an external drive and it made a complete time machine backup. It now boots properly (regular speed) to login screen where the beachball will sometimes appear and other times let me login but appear as soon as I try to do something - except once!! Since doing a number of "fixes" - changing out RAM, more than half of hard disk storage remains, Disk Repair (showed okay), Reset PRAM, Safe mode, re-installing High Sierra - I've tried all I can think of. Spinning Beachball Continues It's a 21.5" mid 2011 iMac running High Sierra 10.13.6. I really don't want to have to make sure my backup disk isn't plugged in every time I restart the machine.ĭoes anyone know what might be happening and how to fix it? I have reset PRAM and SMC and it still happens. This wasn't an issue before the upgrade to Big Sur, and it is still an issue after the full recovery of my Catalina backup. Whenever the backup drive is attached at power up the computer seems to get confused during boot and ends up in recovery mode. Even holding Option at power one selection the bootable drive doesn’t work. I have made sure the Start Up disk is set properly to the T3 SSD and it still does not boot properly if the backup disk is attached. Once it is booted I can connect the backup drive and all works as expected. I tried restarting without the 4TB backup drive connected and it worked (I wish I would have tried this after the upgrade to Big Sur). On Sunday I reinstalled from a backup from before the upgrade and guess what, it still booted to recovery. I tried everything (well almost everything as I leaned today, keep reading ) and I couldn’t get Big Sur to boot normally. Saturday morning I upgraded to Big Sur and after it was done, I found the system had booted to recovery mode. After upgrade to Big Sur iMac does not boot correctly and boots to recovery when external drive with time machine backups is connected 2014 21.5” iMacĬatalina OS 10.15.7 is on external 500Gb Samsung T3 SSD (has been for years)Įxternal 4TB Western Digital for Mac’s local backup as well as a network backup drive for other MacBooks on the network (has been working perfectly for over a year)
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