Art Teaching with a touch of Technology

I had recently had a Mac on Lion unable to load the Users & Groups Preference Pane.   Like this: My IT support had suggested reimaging the computer.  Reinstalling the Operating System, reloading the applications, and transferring back the User information from Time Machine Backup. Well, after doing all of that, the problem reappeared immediately.  I scoured through Apple Support Communities and found this fix.  For some reason, some transparent users are showing up in your system.  They need to be deleted.  But since you cannot load Users & Groups... it becomes a problem. Here is the solution / procedure. Quit System Preferences.   Launch Terminal.  (Applications/Utilities/Terminal)   Copy & Paste these commands. sudo dscl . delete /Users/Guest press enter Terminal may ask for your Administrator Password, enter that. sudo dscl . delete /Users/Guest1 press enter ...

AirDrop, Apple's somewhat unknown feature, works on most modern Macs.  What it does:  It allows you to drop a file to another Mac, over Wifi. Want to know more about it?  Look here:   http://osxdaily.com/2011/11/14/how-to-use-airdrop-in-mac-os-x/ But, you need to be able to see other users to use it.  For some reason, my Mac, running Mountain Lion, just stopped showing other users, I couldn't see them & they couldn't see me.  I was worried that I would have to reinstall my OS, which may not have fixed it.  Then, I found this script for Terminal.  Now, I am Not a Terminal expert, but this was just a cut / paste fix. To find Terminal on your Mac, go to Applications / Utilities / Terminal.  Cut / Paste this code and press Enter. defaults write com.apple.NetworkBrowser BrowseAllInterfaces 1 Launch Airdrop as normal, and you should be back up and running! Original Source for Terminal Script:  http://www.yourdailymac....