MP 1,1-5,1 MP 5,1 shuts down mid-boot with Catalina

[Objectivist-C]

I have Catalina installed on an NVMe drive using the VMWare Fusion method. After upgrading to 10.15.5, I was unable to boot to my Boot Camp partition because the Startup Disk prefpane threw up errors about being unable to “bless” the disk. I reset the NVRAM to solve this, but now when I try to boot back into Catalina, my Mac just shuts down after a minute or so and I have to reset the NVRAM again to return to Mojave. Both Mojave and Windows boot normally. I’ve tried running First Aid in Disk Utility to no effect. Not sure where else to start to diagnose this? Any help would be appreciated.

 

[h9826790]

I have Catalina installed on an NVMe drive using the VMWare Fusion method. After upgrading to 10.15.5, I was unable to boot to my Boot Camp partition because the Startup Disk prefpane threw up errors about being unable to “bless” the disk. I reset the NVRAM to solve this, but now when I try to boot back into Catalina, my Mac just shuts down after a minute or so and I have to reset the NVRAM again to return to Mojave. Both Mojave and Windows boot normally. I’ve tried running First Aid in Disk Utility to no effect. Not sure where else to start to diagnose this? Any help would be appreciated.

You cleared the no compat check boot argument which is required for you to boot Catalina.

 

[Objectivist-C]

You cleared the no compat check boot argument which is required for you to boot Catalina.

You’re exactly right, thanks!

edit:
In case anyone else ends up in a similar boat, the full solution:
1) set startup disk to Mojave partition
2) enter Recovery Mode by holding Cmd+R after rebooting
3) launch terminal and enter nvram boot-args="-no_compat_check" (no sudo required)
3b) optionally, verify that it's correctly set with nvram boot-args
4) set startup disk to Catalina and reboot