Are clean installs necessary?

Discussion in 'macOS' started by TSE, Aug 8, 2014.

  1. TSE macrumors 68030

    Jun 25, 2007
    St. Paul, Minnesota
    I'm going to go the legitimate route of getting all my programs for this school year, so if I uninstall all these programs and install the new versions of them, will the old versions leave anything behind?

    Is installing a clean slate of OS X, even when upgrading say from Mavericks to Yosemite, ever necessary?
  2. psik macrumors 6502

    Aug 21, 2007
    God may say necessary, I say very recommended, so it's close to necessary if you want to play it very logically.
  3. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    It depends on how you uninstall them. If you just drag the app to the trash, then yes there will be all sorts of support and settings files left behind. You need to search the drive for those files and remove them.

    There are proponents of clean installs here, but I am not one of them. If your system is working fine now, a simple upgrade to the next OS version will normally be fine.

    When you see issues is with software version conflicts with the new OS. This seems to happen more often with odd utilities that regular applications. For example there is a utility that makes the menu dark colored and people that were running that utility in Mountain Lion and upgraded to Mavericks had all kinds of lockups until they figured it out and removed that utility. A clean install would have solved that issue.

    But beyond a conflict like I described, IMO a "clean install" is a big waste of time.
  4. satcomer macrumors 603


    Feb 19, 2008
    The Finger Lakes Region
    I tell even long time OS X users that after an "upgrade" I urge them to use the free program EtreCheck to see if an old service is running that is not compatible, then you could manually delete that old service.

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