iTunes 11 for Mac running at 100% CPU when just playing music

Just in case this saves anyone else a few minutes of boring googling: the solution was to log out of the iTunes store and log back in again.

Details:

iTunes on Mountain Lion was being very unresponsive and beachballing, despite not apparently doing anything except playing music, and Activity Monitor said it was using 100% of one of the CPUs.

The CPU activity would drop right down when I stopped the music and jump up again when I restarted it. After searching around on the Apple support forums, I saw the suggestion to log out of my iTunes Store account; it seemed unlikely to work, since I didn’t have the store open… but it did. And I was able to log in again without the problem returning (yet! *crosses fingers*). Hope this helps someone.

2 Comments

  1. Douglas
    5 August 2013 at 11:48 pm | Permalink

    Crazy, that worked for me too. Thanks!

  2. Harry
    6 August 2013 at 8:14 am | Permalink

    Glad it helped someone!

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