My macbook pro 13 (2011) iSight stopped working after upgrade to Yosemite

Hello VascoSilva,

Thanks for using Apple Support Communities.

Since you have already checked other applications, you know that the issue where your iSight camera not being detected is not application-specific. Continue troubleshooting this issue with step #2 below.

Built-in iSight cameras

These steps are for iSight cameras that are built into a computer, such as the iMac G5 (iSight) or later, the MacBook, or MacBook Pro.

1. See if the issue is application-specific.
   Try another application (iSight works with applications like iChat, PhotoBooth, and iMovie HD 6) to see if the iSight camera exhibits the same behavior in all applications. If it only happens in one application, try reinstalling that application.
2. See if the issue is user-specific.
   Test your iSight camera in another user account. If the issue only occurs in one user, the issue would be isolated to user settings.
3. Find out if the computer recognizes the iSight
   Check System Profiler (in the Utilities folder, inside the Applications folder). Under the USB header, check to see if the iSight camera is detected.
4. Reset SMC or PMU
   Reset your computer's SMC or PMU, and then check System Profiler again. (SMC reset instructions for iMac G5 (iSight), Intel-based iMacs; PMU reset instructions for MacBook and MacBook Pro.)

If your built-in iSight camera is still not behaving correctly after trying all these steps, you may need to contact Apple or an Apple-Authorized Service Provider for service.

How to Troubleshoot iSight

Take care,

Alex H.