iMovie 10.0.1 Now Available
Installing iMovie (2013) previously required a computer with an OpenCL-capable video card. This requirement was removed, and iMovie version 10.0.1 can be installed on any Mac running OS X Mavericks. You can learn how to update at the link below.
http://support.apple.com/kb/HT6023
iMovie 10.0.1 also addresses reliability issues when updating projects and events from previous versions of iMovie. Specifically, iMovie could appear to stop responding or quit unexpectedly during the update process.
If you encountered these issues, you should now be able to update your projects and events successfully. To do this, visit the link below and follow the instructions listed in the section "If updating is interrupted or takes an extended period of time."
MacBook Pro with Retina display, OS X Mavericks (10.9)