Re: Serious problem

Hi, Neil, Thank you for this information, it’s a good thing to know. I tried it, but it didn’t work, at least for this kind of situation. I am pretty sure that the problem is the botched changes to the security panel: it has locked down the whole computer and will need the attention of a traine

Re: Serious problem

Hi Pat, If it was me, I would first try and ascertain whether it was a hardware problem or just the OSX installation which had got messed up. I am assuming that you don’t have a bootable clone of the Mac that predates your problem? If you did you could just try booting up from the clone a

Re: Serious problem

Hi,Ronni, Thank you very much for the information. Unfortunately, it didn’t work. The same black screen with just a white Apple is all that is visible. I read all the rest of the support information, and I think the only option is to take it in to a repair shop and hope for the best. Again, ma

Re: Serious problem

Hello Pat, You could try: Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. You can release the keys after about 20 seconds, during which your Mac might appear to restart. https://support.apple.com/en-us/HT204063 Kind Regar

Serious problem

I have a Wacom pen tablet. Yesterday a message came up on the computer that the firmware for the tablet needed to be updated because in the new Mojave update Apple neglected to classify Wacom as safe software, and it was necessary for users to modify items in the Security Preferences panel. So