How to do a defrag (I think that's what you call)?

How to do a defrag (I think that's what it's called)

on an IMac computer

There usually no need to do a defrag, as long as you keep a decent amount of free space on the disk (the boot volume).  The system works defragmentation for smaller size in the background files and large files fragmented usually has no performance impact.  The most important is the free spacefragmentation; performance can suffer if any of your remaining free space is in small fragments scattered on your storage media.  This happens more severely if the amount of free space on your startup disk starts to become really low, and you continue to use your system in this way.

To do a defrag, you need a third-party utility such as Tech Tool Pro.  I don't know what version of the operating system of the Mac you're using. be sure to check the system requirements.  It's a very good idea to create a backup complete, like a clone bootable on an external drive, before using one of these utilities to Defrag.  If something happens, like a your Mac turns off my mistake during defragmentation, the disc may be damaged.  And you also need to be started from another disk to defragment your drive boot, so using the bootable backup to run defragmentation is a way.

It can be useful if you provided more information, such as your iMac model and the version of the OS.  And also WHY you ask this question.

Tags: Mac

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