Mac Shift Key Stuck. Follow this technique to get fluff fizz and debris out from under your keys. When the Shift key is gray it is not enabled and letters are typed as lowercase.
On an iPhone or iPad the Shift key is located at the bottom-left section of the on-screen keyboard. Use a combination of the functionalities of the Keyboard Viewer and KeyRemap4MacBook to figure out which shift key is the problem. But if your Shift key is stuck your Mac will probably boot in Safe Mode foreverunless you fix it.
In fact any modifier key can be locked on simply by quickly pressing that key twice.
I had the same MAC SHIFT key stuck issue the problem was with my US Keyboard software So i added Canadian Keyboard software using Preference then made it to a default keyboard. On an iPhone or iPad the Shift key is located at the bottom-left section of the on-screen keyboard. Then it got fixed i guess my US keyboard software got corrupted. Mac Shift Key Stuck.
