The resolution of macOS beta update prompts insufficient space, infinite loop restart

Before going out this morning, I downloaded the new macOS Catalina beta system and let it update itself. When I came back in the afternoon, I found that the system update failed, indicating that the storage space was insufficient. I encountered this situation in the past, I restarted the computer and entered the old system, and then re-updated after setting some space free. However this time things are different. On the one hand, I still have 20GB of free hard disk space before the update. According to common sense, I should not be prompted for insufficient space. On the other hand, I could not enter the old system after the update fails. I updated the system in an infinite loop, and the update fails. ...

May 10, 2019 · 2 min · Nick Yam