After upgrade to Monterey, trackpad not working even bluetooth mouse is not connected if "Ignore built-in trackpad" is checked
I finally got enough time today to update my MacBook Pro (early 2015) to Monterey. The update went OK, but now my touchpad refuses to work if "Ignore built-in trackpad" is selected even when I switch off my Magic Mouse2.
Before the update, it was working as expected - when the mouse is connected, the trackpad is not responsive, but as soon as switch off (or disconnect) the mouse, the trackpad started to work.
I had the very same issue after upgrading to BigSur, and SMC reset fixed everything. Unfortunately it did not worked this time. I did it twice without results. The only way to get the touchpad working at the moment is to deselect the "ignore built-in trackpad" option in System Preferences => Accessibility => Pointer Control. But this is very inconvenient since I type a lot on my MacBook and during typing I prefer to have the touchpad off.
The funny thing is that the touchpad IS clickable immediately after power on, all until my MBP boots up, when it for some reason "thinks" there is a mouse attached even there is none.
It is obviously a software issue and any help is much appreciated!
Many thanks,
Jager
MacBook Pro 13″, macOS 12.0