Last week my wife was saying her Aperture was slow and she was getting the spinning beach ball far too often. I reinstalled it for her and patched to the latest version, 1.5.1, but it was still far too slow. She has a 20" Dual Core Intel iMac with 2gb of ram and the best video card you can get for an iMac. I knew it wasn't going to fly, but it should have been quicker than it was.

It suddenly dawned on me. I opened the Activity Monitor, from the Utilities folder and saw that Intercheck was running as the highest process. Intercheck is the process used by my anti virus software made by Sophos. I added her Aperture Library as an exception and Aperture is now much quicker. By default the Aperture Library is in your Pictures folder.

If your Aperture is running slowly make sure your anti virus software isn't scanning your library.