HT201177: Get help with video issues on external displays connected to your Mac
Learn about Get help with video issues on external displays connected to your Mac
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by rkaufmann87,Jul 10, 2013 2:21 PM in response to Emma_Jacqueline
rkaufmann87
Jul 10, 2013 2:21 PM
in response to Emma_Jacqueline
Level 9 (58,466 points)
Photos for MacEmma,
Getting answers is made a little more easy if you complete a profile. This helps us learn about what verison of OS X is installed, which iMac you have etc. My guess is you may not know how, if I am correct please click https://discussions.apple.com/docs/DOC-3602 for instructions.
Have you run Apple Hardware Test in extended mode 2-3 times in succession? If not and if you don't know how navigate to support.apple.com/kb/ht1509 for instructions.