Recurring problem with Firefox preventing mac OS 10.11 shutdown
I have had this same problem repeatedly over the last couple of years. Every time I fix it it recurs again a month or two later. I have read every article online that matches, followed all advice and still the problem comes back. This time I can't even fix it:
It starts with Firefox preventing Macbook Pro from shutting down (OS 10.11.6 - late 2011 model). It won't force quit I have cleared the library and the cache. I have uninstalled and removed the whole Firefox folder from Library/APplication Support. The macbook then shuts down properly. I have re-installed firefox. BUT without even opening Firefox just putting it in the applications folder, the mac now won't shutdown - the desktop and top menu bar disappear and the wallpaper just hangs. I have run Malwarebytes to see if I have some malware issue - but it's come up clean.
Any suggestions gratefully received! Speaking to you from Safari!
Thanks S
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Sorry all my line breaks have disappeared from the above!
S