Since upgrading to Big Sur the startup up my 2017 iMac has increased massively. It takes at least 4mins to get to a semi useable state, 20 secs of that is a black screen just before presenting the desktop, compared to about 90 secs previously. I've not added any other startup items since upgrading. Anyone else have similar issues?
I'm having the same problem. Before upgrading to Big Sur my Mac was performing great. After the upgrade I'm having over 5 minute boot time and I only get the usual recommendation, remove apps from auto starting etc. But with the same programs it was performing flawless.
I solved the issue. There was a USB-connected Wacom Intuos tablet. If I unplugged it, the Mini booted quickly.
I completely uninstalled/deleted all Wacom software, rebooted, and re-installed the Wacom software. Back to normal boot time !
I upgraded my partner's 2018 Mac Mini to Big Sur, and startup time is now around 4 minutes. I booted in verbose mode, and I can see that IOKit Daemon (kernelmanagerd) is stalling for IOHIDInterface, three times in a row, each time is 60 seconds.
That explains three minutes of the startup delay, but I don't know what to do next to resolve the issue.
Yeah, I thought I could determine the problem by looking in the system log, but booting up in verbose mode was what gave it away. You might want to try that if re-installing the Intuos doesn't work. Good luck !
I have a USB-Connected Wacom Intuos tablet too with 40GB RAM. Start up time with connected Wacom is atrocious with my 2019 iMac. Going to disconnect it and hopefully I will get the same result as you.
Ooh, I’ve got a Wacom Intuos connected. I’ll give that a go. Thanks
Uninstalling the Wacom and reinstalling has helped greatly, thanks. Will give the verbose mode a go. Thanks for the advice.
Big Sur slow startup time
