Hi everyone,
first,
huge thanks to people making possible to keep our old 10+ yo macs "up to date"

Feels great to have big sur on the cheesegrater.
Legacy mac pro 5,1 owner here, and cannot quite say that update has been smooth.
Anyway, i managed to have hardware acceleration on RT 5700 XT, which is already great.
Don't know if i'm at the right place for assistance, but here it is :
For now, i have 3 problems :
- black output on display port for 27' cinema display (from RT 5700 XT) - second screen works great though
- 5 min boot time, due to (3 times): IOKit Daemon (kernelmanagerd) stall[0], (60s): ‘IOHIDInterface’ (from verbose)
- mac sees update, but refused to even download it (see attached pictures) and make an error.
Update is available (strange double version number though)
Download seems to stop after few seconds
then makes an error - roughly translates to "download failed, check your internet connection"
Runnin low on solutions for these, i'll be glad to bring anything you could ask to help me
