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Topic starter
I ran in to a non-bootable Mac after updating 5.7.3 to 5.7.5 (Full SoftRAID) This is not an important machine, so I'll investigate later.
I inadvertantly updated a production machine as well (SoftRAID Lite). Oops, lets NOT REBOOT here... I force-quit SoftRAID app after it updated, fearing I might run into the same issue.
So I now have Kext 5.7.5, with rebuilt boot caches, reboot pending.
I very much want to go back to 5.7.3 untill I understand what happend with the other machine this got stuck.
I would now like to downgrade this Mac to 5.7.3. It seems that not really possible while booted from the volume.
So, is it safe to:
- Manually replacing the 5.7.5 KEXT with the 5.7.3 one
- touch /System/Library/Extensions
- sudo kextcache -Boot -U / ** Not shure about this command
- reboot
Or is there another solution, apart from booting form another volume with 5.7.3?
(Both are running El Capitan 10.11.6)
Posted : 26/03/2019 3:35 pm
No it is not safe to manually change the SoftRAID files. OS X is complicated when it comes to extensions (drivers). So please don't try that. The best way to remove or change a SoftRAID driver is using the SoftRAID application.
We did not change anything which would affect bootability in 5.7.5, so this must be a different issue.
Here are a couple ideas:
Boot from another volume with the same OS X version.
(You can start with 5.7.3, yes)
Run SoftRAID
Reinstall SoftRAID driver into your main startup volume.
See if it can startup now.
If so, try updating to 5.7.5 again.
Posted : 26/03/2019 3:40 pm
Topic starter
That's what I did on the problem machine. SoftRAID then proposes to downgrade the other (main) boot disk. After doing that, it boots up again. I will try another update later.
What I would like to know is, is there a way to downgrade without booting from another volume?
Posted : 27/03/2019 2:42 am
Yes, but in this case your volume was not bootable. So we had to go around.
Generally, you can run any System, then upgrade/downgrade the SoftRAID volume. But if the volume is not bootable, or there is an ownerships issue in your /Extensions issue, then you may need to apply the driver from another startup volume.
Posted : 27/03/2019 12:21 pm
