New answers tagged resolution
it could depend on what you are recording. if it is minecraft you can add a setting that it is 1280x720 pixels. you then record that using obs or crop it a bit using quicktime.
Hadn't seen this solution anywhere which worked for me and a coworker. Check to see if there are any updates for your mac. I had a security update that I was not aware of so I updated and restarted without my monitor connected and it started up just fine.
Press and hold the Option-Command-P-R keys immediately after powering on. This will reset the login screen resolution
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