Maintenance Tasks to Skip

Careful readers may have noticed that I omitted several commonly recommended tasks from my maintenance regimen, such as repairing permissions, defragmenting disks, running the macOS maintenance scripts, periodically changing passwords, and deleting cookies. In addition, I haven’t recommended installing antivirus software. Read this chapter to discover why you might never need to do these things—or whether you’re one of the few people who should.

Repair Permissions

For many years, if you were to visit Mac discussion forums and news sites, you’d see repeated recommendations to use Disk Utility’s Repair Disk Permissions feature. Some people recommended repairing permissions on a daily basis, or before and after every ...

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