My Macbook Air will not upload the latest Software updates. What's up?
I have been trying to update the lastest Software update and it isn't uploading. What is wrong?
MacBook Air 13″, macOS 10.13
Try the standalone Security Update 2020-005 (High Sierra) in Safe Mode...
https://support.apple.com/kb/DL2053?locale=en_US
Safe Boot, (holding Shift key down at startup).