I installed a lot of OSS packages when I got my new MacBook. After many updates and 2 OS upgrades XCode command line tools has REALLY gored itself. IT thinks it is installed. But everything I try to do says CLT is NOT installed. I have attempted with GREAT prejudice to delete XCode and reinstall. Mostly all I have done is lose the source code for my website. But CLT is still not usable.

I am now to the point of ready to reinstall 10.14. I do have a time machine backup but have never tried to use it to recover an entire machine before.

Will this really work? I am pretty stuck right now as Ruby but if I’m going to have to start from scratch in setting up I’ll just do without.

Opinions on bare metal reinstall?

1 Answer 1


Yes, it should really work!

However the best way to be sure of any backup is to always have multiple backups, so in this case a Time Machine backup and a drive clone using SuperDuper or Carbon Copy Cloner would be advisable.

  • My biggest concern, well that is losing my data. But the next biggest concern is that TM restores the messed up /Library stuff and/or NOT restores the /Applications stuff.
    – Terry
    Nov 22, 2018 at 0:53
  • If you’ve not configured Time Machine through System Preferences then it should do what you want as you can select which parts of the backup to restore. Nov 22, 2018 at 9:14
  • However there are no guaranteees on a backup so using CCC or Super Duper will ensure a second recovery which is just a clone that can be recovered. Nov 22, 2018 at 9:15

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