I am using a Late 2012 Mac Mini exclusively through Screen Sharing on my MacBook (Both on 10.13.4). The only way I could get the Mac Mini to full resolution was to:
- Close connection from my MacBook to the Mac Mini on MacOS's native Screen Sharing utility
- Plug Mini DisplayPort adapter into Mac Mini (leading to an Apple Thunderbolt Display)
- Immediately unplug it
- Log back in on MacBook
When I restart the Mac Mini, the display immediately returns to 1280x1024. The highest I can get it to is 1920x1080, and that's while holding ⌥ (Alt/Option) in Display Settings. Is there a way I can get it to 2560x1440 without having to arbitrarily plug it into/unplug it from the display?