window window on startup
When I restart my Mac I often find this window (titles Window) opens up - what is it? is it a problem? and how do I get rid of it in the future?
MacBook Air, macOS Sierra (10.12.6)
Go step by step and test.
1. Try startup in Safe Mode.
Start up in Safe Mode. https://support.apple.com/en-us/HT201262
Once in Safe Mode, click the “Restart” button at the bottom.
2. Reset NVRAM/PRAM. http://support.apple.com/kb/PH18761
3. Remove login items and test. https://support.apple.com/kb/PH25590?locale=en_US
4. Backup and reinstall macOS from macOS Recovery.
Use the appropriate key combination