Bug or Possible Exploit?
Returned to my iMac (27", Late 2009, Core i7, 10.13.1) to discover the Dock unhidden, which was not how I left it 5 minutes earlier. No one else has had physical access to the machine (home office). In System Preferences, the Automatically hide and show the Dock check box was un-checked, which is not how I had it set previously. Has anyone had a similar experience? Known bugs?