My MacBook Pro trackpad doesn't work after log in
Trackpad works before login. After login it no longer works.
[Re-Titled by Moderator]
Original Title: trackpad not working after login
Question marked as
If after logging in you notice a Mouse Keys Alert be aware that when Mouse Keys is enabled in macOS, it disables the trackpad.
To disable the trackpad when Mouse Keys is on, you need to go to System Settings > Accessibility > Pointer Control > Alternative Control Methods > Mouse Keys and enable the "Ignore built-in trackpad when Mouse Keys is on" option. This setting prevents accidental trackpad input while using Mouse Keys.
If Mouse Keys are on after logging into macOS, they can be toggled off by pressing the Option key five times quickly. If this doesn't work, you can also try pressing the Touch ID button three times quickly, or using the shortcut Command, Option, and F5 to bring up the Accessibility menu where you can disable Mouse Keys.
I most likely pressed the option keys inadvertently five time to enable it.