UltraDefrag is not available for Mac but there is one alternative that runs on macOS with similar functionality. The best Mac alternative is iDefrag. If that doesn't work for you, our users have ranked more than 10 alternatives to UltraDefrag, but unfortunately only one of them is available for Mac. If you can't find an alternative you can try to remove all filters.
Over time, the operating system itself ends up scattered all over your disk.
This, of course, doesn’t show up as fragmentation—after all, the files themselves are probably contiguous—but nevertheless, it takes your machine longer to start up, it takes programs longer to start, a.
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