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I am running OmniGraffle v5.3.6 (latest) on my 13" MBP (late 2011; Lion; 2,7Ghz; 4GB). I would NOT expect performance issues on this machine. For some reason it has significant delays when OmniGraffle is running. It would stop for 2-10 seconds, then show the spinner for some seconds and then run normal again.

Q: Any ideas what to do (except for stopping to use OmniGraffle)?

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up vote 2 down vote accepted

There could be quite a few explanations for your delays, and I might start by checking the Activity Monitor and the Console. In the Activity Monitor, are any applications or processes taking up an inordinate percentage of CPU time or RAM? In the Console, are there any errors being reported? These are just basic troubleshooting strategies, and maybe you've already exhausted them.

You may find that you don't have enough RAM to run the program optimally. I have a 4GB machine and have had similar slow-downs with Aperture. The solution which worked for me was to run the program in 32-bit mode. You can do this by selecting the program (in your case Omnigraffle) in the Finder, choosing File > Get Info, and then ticking the checkbox marked "Open in 32-bit mode."

Bear in mind that 32-bit mode will (I believe) limit the program to address a maximum of 4GB of RAM. That isn't a problem for you now, but might limit performance if you added more RAM to your system in the future.

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I looked at the activity monitor and couldn't see any notable peaks from OmniGraffle. However, available free RAM is low in generals (<100 MB) and I will start investigating on this. Also good idea with the Console which I didn't do before. No notable errors here from OmniGraffle as well. Anyway, thanks much! –  greenforest Mar 14 '12 at 13:58
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