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macOS FAQ

How do I log out?

In Mac OS X, it logs off in exactly the same way as in other operating systems. You just need to know where the menu is hidden. Note that programs do not have a control menu in the same window as you may be used to from Microsoft Windows, or KDE or Gnome, but it is separate and located in the bar at the top of the screen. In addition to classic items such as File , Edit or Help - the menu starts with the Apple logo, which is another menu item in which the searched "Log out" is located at the very bottom.

How to start a text terminal?

The text term can be started as follows:

  1. I open the Finder application (the first icon of a smiling face on the bottom bar).
  2. Click on Applications .
  3. I'll find Utilities .
  4. Click on Terminal . A pop-up terminal icon may appear shortly - indicating that the application is running.

A new terminal window is created by clicking on the menu File -> New Shell . The menu is located at the top of the screen.

XCode error "The operation could not be competed. (Cocoa error - 102.)"

You may encounter this error when trying to run your application via Xcode in iOS Simulator. This is due to the fact that iOS Simulator does not support running applications that are in a network-mounted location via NFS. At the same time, the home directories where the applications are located are currently mounted via NFS.

The solution is to create a local directory where the application will be saved and redirect iOS Simulator to it. This can be achieved by the following commands running in the terminal:

mkdir /tmp/$USER
mkdir -p ~/Library/Developer
rm -rf ~/Library/Developer/CoreSimulator
ln -s /tmp/$USER ~/Library/Developer/CoreSimulator

If you log on to another machine, you need to step with mkdir execute again because it is a local directory on the machine. It is advisable to delete this directory after finishing the work ( rm -rf /tmp/$USER ).

Where to look for help?

  • Mac OS X Hints
  • If you do not know the advice and you are not able to solve your problem on your own, it is possible to write to unix@fi.muni.cz where we will try to help you.