Defrag Of my mac

[gnasher729]

Yep. New HD, new data, no problem! Just keep buying new harddrives when it gets very fragmented. (for special people) </sarcasm>

1. HFS+ has no problems with fragmentation.

2. Every harddrive will slow down when it's almost full, disk based drives and SSD drives, but for different reasons (SSD only for writing). And it is independent on the OS. Just replacing a disk based hard drive with one of twice the size will make things faster.

3. Replacing a hard drive with a new one will also make things faster if the new one uses newer technology. A 2011 hard drive is faster than a 2008 hard drive.

4. And finally, it the OP thinks that things are "buggy" that may be because a hard drive is on its way out.

 

[philipma1957]

I have Onyx, which does a number of things that Macs do overnight anyway, plus a few other bits and pieces. If my iMac (250gb, 50gb free) starts slowing up (usually resulting in spinning pizzas too often) I run most of the things that Onyx does, and it gets better. I suspect that, on the whole, its repairing permissions that does the trick, but as it clears caches of various sorts as well, I run the lot.

It may well be the placebo effect, but it works for me...

Tiptopp

yes it may help you but if you had an easy to change hdd and dropped in a 2tb hdd instead of a tiny 250gb hdd your would really help your machine. I love the iMac concept but the sealed hdds are very bad karma. (I am an owner of a 2009 imac)