Sadly my new MacBook '15 just became super slow and unstable after upgraded to macOS Sierra. Siri won't work; Chrome and Safari crashed once an hour; AppStore, Slack, iWork and Office won't open. Anyway I can reinstall the system without losing my data?
Report
@heathermhuang Back it up with Time Machine to an external drive, then whipe the drive, and do a clean install of Sierra, and on it's first boot when it asks about restoring data, select your Time Machine backup.
Most things should be back to how they were just fine after this, unless you've got really custom stuff setup like Homebrew.
Report
In keeping with Apple's release cycle, Apple will stop releasing new security updates for macOS High Sierra 10.13 following its full release of macOS Big Sur
Replies
Pagedone
RewardMe