File extensions (.jpg, .txt, .pdf, etc) are normally hidden by default in OS X. You can either set all extensions to be displayed through the following command:
Do you often have to do a presentation on your Mac and don’t want others to see what’s on your desktop? It’s possible to quickly hide the icons on your desktop. Launch Terminal and enter the following command.
It is possible to disable the OS X Finder menu option: ‘Finder ▸ Preferences’ (cmd⌘ + ,). This will prohibit setting changes in the OS X Finder application.
Disable the menu option: ‘Go ▸ Go to folder’ in the Mac OS X Finder menubar.
The ‘Simple Finder mode’ hides desktop files, and won’t let anyone open a new Finder window. Only applications in the Dock can be launched. Note that Spotlight can still be used for launching items. This command could be a nice alternative for setting up restrictions without a guest user account. Click Finder ▸ Run Full Finder, and then type in your admin password to start Finder in normal mode.
When browsing into the Finder folders, you may lose your current path. You can enable the path view (like View ▸ Show Pathbar) in the title bar of the Finder window. The command show the complete posix path in the title bar.
You can prevent users from burning CD/DVD media on your Mac. Enabling this command will result in the following message when trying to burn a CD or DVD: “The operation can’t be completed because you don’t have the necessary permission”.