Q: my quicktime isn't working since updating to os x el capitan

Hi annie10053,

Welcome to the Apple Support Communities! I'm sorry to hear you are having these issues with your Mac after a recent update. I also apologize, I'm a bit unclear on the exact nature and scope of the issue you are describing (what is happening, what you are seeing, what version of QuickTime you are running, etc). For generalized QuickTime issues, you may find the links and resources listed in the following article helpful:

Self-help resources for QuickTime 7 and QuickTime 7 Pro - Apple Support

Regards