My Mac is acting like a key is stuck

I have the same issue controlling my late 2015 27" iMac in my office with an older MacBook Pro at home. When I had the old Mac Pro tower (before the iMac), there was never an issue. Plus I always use wired keyboards and Logitech USB mice, which never caused any problem.

As soon as I got my MacPro (that could not update anymore) replaced with this crappy iMac at work the problems started. You can see in the Keyboard Viewer on the iMac that when I press any single key like command or option from my MBP, the Keyboard Viewer on the iMac shows all the modifier keys and FN key light up and stay that way. I have to hit random keys to get them unstuck temporarily, like for a second until you hit the next key. Trying to type in a text box in InDesign is nearly impossible. While the text tool is selected, it only wants to stretch the text box which skews it, like someone is holding keys down at the other end. I have disconnected everything (keyboard, mouse, bluetooth) from iMac and I have tried using different keyboard/mouse combination on this end making no difference whatsoever. This has to be something messed up with screen sharing no doubt as all keys and controls work fine for each computer locally.

Apple's geniuses have no clue after discussing it with them. They just want me to bring in the iMac to a center; but I can certainly reinstall everything myself—which is what they would probably recommend anyway. And more than likely since this iMac had a clean install, the issue would probably still be there after all that trouble.

Do you have a Wacom tablet? I received very specific information from Wacom on how to completely uninstall the Wacom drivers and all of the preference files. This fixed the problem on my work system. I don't know if I'm allowed to share all of what they sent me. It really did help.

Hi Scott,

I noticed your answer and was wondering if you mean that the "stuck" key was caused by your Wacom tablet? I had at home the same annoying problem when I was using my MacBook Pro while at work it never happend. I now have a new 21" iMac with the wireless keyboard 2 and the same problem occurs.

Until now I tried looking at wifi signals and stuff which might cause the issue until I read your post because I do use a USB connected Intuos 4 tablet of Wacom, at work I use a smaller Intuos 5 and I do not have the issue here but the problem only happens when I indeed connect the Wacom tablet (intuos 4) on my MacBook Pro or iMac and use a wireless keyboard...

If this is indeed the failing setup... do you then have a solution as well (beside not using the tablet anymore)?

Regards,

Nico

It that took care of it chances are it's fixed. After you are satisfied please use the legend to your right, it could help other users in the future.

Hey there,

I have the same Mac and recently started experiencing the same problem! Were you ever able to resolve it??

Thanks,

Toni

I was wrong, the turning off the Bluetooth was a temporary fix. It went back to acting odd shortly thereafter.

I re-installed iOS and my Mac has been working perfectly ever since... Pain in the rear end, but a simple fix.

For my case it was actually 2 faulty bluetooth keyboard. I got a new, working perfectly for about 2 weeks now.

Mine does it on startup only. If I press the escape key a few times, it stops it. It's definitely the keyboard, as I use the same Mac Mini with a different keyboard when I'm in Florida.

Thank you for that, DOH!!!! the moment I read your reply I looked over and saw that something had fallen on to the space bar of my wireless keyboard

Omg... yes this was exactly it.

OMG my wireless keyboard was in the other room with a lamp laying on it. Problem solved