Every time Apple release a MacOS update my iMac will not install it directly, giving the attached error (in Dutch: Error at kernel cache generation).
Only way to install the update is to then run Recovery mode and do a new install.
1 important thing to note: I run my late 2013 iMac from an external SSD (not the internal HD).
Any ideas would be super welcome.
Thanks.
iMac 21.5″, macOS 10.15
Hey HansC,
Thank you for using Apple Support Communities!
I see from your post that you're having issues with downloading macOS Catalina. I'd love to help out.
I'd start with trying to download the combo update here:
Download macOS Catalina 10.15.2 Combo Update
If that doesn't work, try upgrading in safe mode:
How to use safe mode on your Mac - Apple Support
Let us know if that helps.
Cheers!
Dear Moon,
Thanks for taking the time to try solve my issue.
Must say that I do not think this is the solution. Downloading is not the problem I have. Every time Apple releases a Catalina update, I see it in System Preferences, and can download the update just fine. The problem I have is when I try installing it: every single update I get results in this error 'cannot generate kernel cache'.
As I wrote, the only solution is then to restart in recovery mode and do a clean install.
Not sure if the fact that I run the iMac from an external SSD had anything to do with it, but it's the only differentiating factor with the normal setup.
Thanks for keeping on thinking.
Hans
Hello, the same thing happens to me, but have you managed to update to the latest version (update)?
I have the same issue and it only started after installing Mac OS Catalina on a SanDisk SSD. Now every update there is a kernel error which requires a new install from Internet Recovery.
I did manage to update, albeit with the same procedure as always: reinstall of MacOS.
Yes, mine is also a SanDisk (type: Extreme 500 (240GB)).
Hope that Apple solves this kernel error update issue, because it is quite annoying.
Yes, it seems that it is indeed a problem with those SSD memories, mine is a SanDisk Extreme 510 (480GB)
Error updating MacOS (kernel cache)
