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I don't know where to/couldn't find 10.12.5, but I found 12.2.1 in the downloads area, downlaoded it and that one did install and is working....
Uninstalled it, ran First Aid, still nothing - Installer wouldn't open (quits about 1s into launching it). I suspect that also has to do with...
Looking at the error message/log information, it includes: Exception Type: EXC_CRASH (Code Signature Invalid) I tried to reinstall, but the...