… for Random Weirdness
Tip #1151: Rescue Your Storage Using Recovery Mode
The key is to be sure you are pressing the keys before you restart your system.
There’s a new way to keep your Mac running smoothly – it’s called “Recovery Mode.” Here’s how it works.
Shut down your Mac. (You can do this from a restart, but the timing of when to press the keys is trickier.)
Before you push the power button, press and hold Cmd + R. Then, turn your system on.
Continue pressing both keys until the startup thermometer gets about half-way across the screen.
What you’ve just done is tell your Mac to boot into a hidden start-up volume called the Recovery disk. You can’t run your normal applications with it, but you CAN:
- Reinstall the latest version of macOS.
- Repair your boot disks using Disk Utility
- And two other options that I, ah, forget
Once boot up finishes, you’ll see a menu with four choices. Click the bottom one: Run Disk Utility.
When it opens, you’ll see two internal drives in the sidebar on the left:
- Macintosh HD
- Macintosh HD – Data
Select each one in turn and run First Aid. This fixes any problems with your boot disks; which are the ones most likely to show signs of disk corruption.
NOTE: In the distant past, we would sometimes zap the PRAM or reset the SMC. The vast majority of the time those old stand-bys won’t help today. Recovery Mode will.
When you are done, restart your Mac and get back to work.
NOTE: This is a good utility to run every month or so and is much superior to launching into Safe Boot, which we used to do in the past.