1.  The Macs in the lab are patched together from various pieces of equipment.  It works because
I have a lot of adapters and stuff.  Don't scavenge the Macs for parts.

2.  The adapter issue is what is responsible for the black vertical line in the middle of the screen.  If you have this and it bothers you, disconnect the monitor from the Mac and plug it back in.  The monitors screen definition is better than HD and at the very limit of what the
Adapter can process.

3.  There are no "accounts".  No "Usernames" or "passwords."  These Macs are to be shared.
Don't leave your stuff on the Mac.  When you're done working on it, move your stuff to a flash drive and clean your stuff off the Mac.

4.  I've installed the most recent software on the Macs, but it WILL go out of date before the semester ends.  Should the Mac demand an admin password to update, just let me know.

The mice don't have "right click".  They are single button mice.  If you like, you can bring in your own mouse.  And on a Mac, control-click will trigger the right button.

A lot of your shortcut keys involve the "Command" key which looks like a four leaf clover.  If, like me, you are using VNC to hook into a Mac, perhaps the Alt key will trigger the Mac command key.

Command C, Command V, Command A, Command X, Command Z all do what you expect.

The latest Xcode has been installed.  It's the icon on the dock with a hammer on it.

The "View Controller" contains a "View".  The "View" contains the components of the View, such as Labels or Buttons.  The View Controller is what controls the view programmatically.  When you need to write software so that your app does cool stuff, that code goes in the View Controller (usually) and this code can help set up the view and the stuff in the view.