[Solved] Big Sur 11.4 update is missing on 11.3.1

[cci[RR]us]

On my Z170 build my CSR shows FF0F0000 and my BlacklistAppleUpdate is set to false - and I manage to get the updates. Have you also set rtc-blacklist for NVRAM UUID 4D1FDA02-38C7-4A6A-9CC6-4BCCA8B30102 ?

I didn't set rtc-blacklist; it is currently empty.

But I took your advice to set BlacklistAppleUpdate to False and tried some combinations:

csr-active-config=00000000 and BlacklistAppleUpdate = False (Success!)
csr-active-config=FF0F0000 and BlacklistAppleUpdate = False (No updates!)
csr-active-config=FF0F0000 and BlacklistAppleUpdate = True (No updates!)
csr-active-config=00000000 and BlacklistAppleUpdate = True (No updates!)

Thanks everyone for the help!