iMovie is running unbearably slow

Discussion in 'Mac Apps and Mac App Store' started by boomdog, Feb 8, 2015.

  1. boomdog macrumors regular


    Oct 3, 2013
    The most Easterly point of the UK
    Hello all,

    I'm using iMovie for the first time and all was going well for the first 2 hours but all of a sudden it just crashed. Stopped working for 10+ minutes every time I clicked anything! Clearly, I can't work like that, any ideas on what might be causing it?

    I'm running OS X Yosemite 10.10.1 on a 2013 MackBook Pro Retina with 2.3GHz i7, 16GB ram, SSD and iris pro graphics.

    I'm editing about 3 hours of HD footage down to about a 15 minute highlights clip. I'm adding additional audio commentary over the top that has been recorded in quicktime.

    Any suggestions welcome
  2. AppleP59 macrumors 6502

    Feb 24, 2014
    I would watch your Activity Monitor
    (Applications > Utilities > Activity Monitor)

    Or look to the toolbar in iMovie itself, sometimes iMovie is uploading projects in theatre to iCloud etc.
  3. AppleP59 macrumors 6502

    Feb 24, 2014
    Any improvement?

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