Hello Carol, I posted a fix that worked for me perfectly, it was webroot virus scanning software. I turned it off, and the problem disappeared. I only run it at night, when I’m not working. An apple tech told me virus scan software can interfere with key commands. Not sure if this is your issue, but hope it helps. My macbook pro was fine, the software wasn’t installed on it, it was the mac pro with the virus scanning software that had the issue. Good luck
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