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  1. #1

    johndope83's Avatar
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    Do we need to defrag Mac like PC?
    Ei guys!!! Sorry again for being troublesome with all my questions and queries. Still new with MACs and still have a lot more to learn. Hope you can help me out.

    Anyway, my question is do we need to defrag MACs like in PCs? I've been a long time PC user and I always defrag my hard disk at least 2 a month. Is it also applicable to MACs?

    And lastly, any advice what should i do to keep my mac (the system) troublefree?

    Hope some one can clarify this for me. Thanks!!!

    Cheers!!!

  2. #2

    roflitskyle's Avatar
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    You don't really need to defrag your Mac. Sometimes though, defragging (is that a word?) to put some data back in order.
    (I am sure that some one with greater knowledge about defragging will chime in)

    To answer your question about how to get your system trouble free, I suggest CleanMyMac. The app will run system checks, and you can have it get rid of languages you don't speak. This will free up some hard drive space.

    Good luck, and don't hesitate about asking questions

    - Kyle

  3. #3

    osxx's Avatar
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  4. #4

    johndope83's Avatar
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    Quote Originally Posted by roflitskyle View Post
    You don't really need to defrag your Mac. Sometimes though, defragging (is that a word?) to put some data back in order.
    (I am sure that some one with greater knowledge about defragging will chime in)

    To answer your question about how to get your system trouble free, I suggest CleanMyMac. The app will run system checks, and you can have it get rid of languages you don't speak. This will free up some hard drive space.

    Good luck, and don't hesitate about asking questions

    - Kyle
    thanks took your advise and tried cleanmymac. got rid of 850 MB of unwanted files thanks!!!

  5. #5

    roflitskyle's Avatar
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    Quote Originally Posted by johndope83 View Post
    thanks took your advise and tried cleanmymac. got rid of 850 MB of unwanted files thanks!!!
    No problem. Glad you found it useful.

    - Kyle

  6. #6

    johndope83's Avatar
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    @osxx - hmmm...what you sent seems really interesting. thanks for sharing

  7. #7

    Oneironaut's Avatar
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    OSX defrags files under a certain size automatically. There are programs out there that are supposed to defrag larger files, but from what I've heard, they can cause system instability. If you want to free up some HD space, just do a clean install and use a Time Machine backup to restore your files. I did once and regained almost 30gb of space!

  8. #8

    toMACsh's Avatar
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    Quote Originally Posted by Oneironaut View Post
    There are programs out there that are supposed to defrag larger files, but from what I've heard, they can cause system instability.
    I've used TechTool Pro to Optimize for at least 6 years. (OS 9 and OS X) I've never had it cause any sort of problem.

  9. #9

    chscag's Avatar
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    Tech Tools Pro is good and perhaps even better is iDefrag. The problem with using iDefrag, however, is that for a complete defrag including consolidating free space is that it reboots the machine and takes control during the process. Depending on how large your hard drive is, it could take hours on end to finish. Rather inconvenient.

  10. #10


    Member Since
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    But the bottom line is NO, you don't need to defrag your Mac like you did your PC.

    If you WANT to do it from time to time, there are several methods -- some of which are mentioned above -- but for a typical user it is by NO means mandatory.

    I use the "clone, nuke, pave, restore" method maybe once a year or so -- and I use my Mac professionally so its on for easily 12-14 hours a day, doing all kinds of different things.

  11. #11

    toMACsh's Avatar
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    Quote Originally Posted by chscag View Post
    The problem with using iDefrag, however, is that for a complete defrag including consolidating free space is that it reboots the machine and takes control during the process. Depending on how large your hard drive is, it could take hours on end to finish. Rather inconvenient.
    TTP gets the job done in an hour or two. I get it started just before going to bed.

  12. #12


    Member Since
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    To answer the original poster.

    No. You do not need to.
    But if you are a little paranoid you can follow the advice of others above or:
    try out the "Maintenance" app.
    Titanium's Software • Home

    Tat little App is very good and keeps your Mac clean and ready to go.

  13. #13

    Doug b's Avatar
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    I'm (once again) going to go against the grain, simply to provide a different perspective. I don't think that anybody here can say with certainty, how the OP uses their computer, so with that in mind, I'll direct said person to a post I made for a similar topic last week (or so)

    First of all: There is NO REGISTRY in OS X, so don't even worry about that for half of a nanosecond. Secondly, Fragmentation in OS X doesn't really occur in the same way as it does in Windows. Check out this article for a pretty simple run down on the process and why using a defrag app is still useful: (read all the way through and don't skim)

    Link:
    Disk Fragmentation & OS X: When Does it Become a Problem?: Apple News, Tips and Reviews

    Onyx is a gem of a tool. Useful for several different things, and is a one stop shop for maintenance. (doesn't defragment though)

    I've had my MacBook Pro for a bit over 3 years, and all I have ever done is run Onyx, keep all my photos and music on an external hard drive (keeps lots of disk space free) and once a month calibrate the battery. I have to do this though, since it's always plugged in as I use an external monitor for photo editing.

    I'll admit, when I upgraded to Snow Leopard I did a fresh install and wiped the previous data with the ol' 7 x wipe. (writes over the data 7 times) Total overkill, but I'm anal like that.

    Everybody here has given the same good advice. You really don't need to go overboard with maintenance as you would with Windows. Try keeping your home folder and download folders clean, don't store unnecessary data etc..

    Doug

  14. #14


    Member Since
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    Quote Originally Posted by Oneironaut View Post
    There are programs out there that are supposed to defrag larger files, but from what I've heard, they can cause system instability.
    It seems Apple also thinks they can cause system instability.

    About disk optimization with Mac OS X
    Note:Mac OS X systems use hundreds of thousands of small files, many of which are rarely accessed. Optimizing them can be a major effort for very little practical gain. There is also a chance that one of the files placed in the "hot band" for rapid reads during system startup might be moved during defragmentation, which would decrease performance.

  15. #15

    chscag's Avatar
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    It seems Apple also thinks they can cause system instability.
    Microsoft said the same thing about NTFS. "It never needs to be defragmented or optimized" and it may cause problems. We found out it wasn't true and their warnings were ill founded. That's why they now include their own defrag program with Windows.

    Granted, Unix is not Windows nor NTFS, but it does fragment over time. And I haven't heard of anyone who has made their system unstable by running a Unix defrag program. (iDefrag, Tech Tools Pro, etc.)

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