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Sierra: A Take Control Crash Course by Scholle McFarland

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Troubleshoot Mac Problems

Maybe the heartache begins with errors when you try to save or open a file. Or, you find yourself staring at an unchanging gray screen. Sierra comes equipped with the tools you need to face everyday troubleshooting problems . Here’s the least you need to know.

**①** Using Sierra’s Disk Utility, you can repair your disk even if it’s the active startup volume. (Briefly colorful in El Capitan, Disk Utility is back to its monochromatic ways.)
Using Sierra’s Disk Utility, you can repair your disk even if it’s the active startup volume. (Briefly colorful in El Capitan, Disk Utility is back to its monochromatic ways.)

Zap a Frozen App

Is your problem an endlessly spinning beach ball? Try these tricks first:

  • Force Quit: First see if the problem is limited to one app. Try to switch to another by clicking ...

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