When you hear the second start-up tone (or, on a Mac Pro, see a second Apple logo appear and disappear), you can release the keys and let the computer finish its start-up sequence. You can reset the NVRAM or PRAM by shutting down the Mac and then starting it up again while holding down the Option, Command, P and R keys all at once. If the Mac is not maintaining its settings for volume level, display resolution, time-zone information or preferred start-up disk, information held in the NVRAM may have become corrupt. Modern Macs also store some settings in an area of the system called the nonvolatile random access memory (NVRAM) older Macs use parameter random-access memory (PRAM) in a similar manner. If you hold the Cmd key down while tapping the Tab key, the cursor will move between the icons from left to right. A row of app icons will appear in the center of your screen. Similar to Windows Ctrl+Alt+Delete Task Manager, the Command+Option+Esc shortcut opens the Force Quit box, which lets you force-quit troublesome programs. If you’d like to quickly switch between open apps on a Mac, press Command+Tab. might fix erratic Mac behavior, although it will not help with a damaged power supply or another major hardware problem. This feature has been in Windows since Windows 2.0 in 1987, and macOS has a similar shortcut. Cmd + q - will close the entire app instead of just the current window. I know about: Cmd + w - in any tabbed application such as google chrome it will close the current tab instead of current window.

(You may also have to redo any preferences for your display and power-management settings.) On windows/linux this is done by alt + f4. While performing a reset does not generate an alert box or notification, you can tell if you were successful if the odd Mac behavior stops. Note: Will only work when meeting control toolbar has focus. The guide also lists a series of things you should try before resetting the S.M.C. reset process for all its Intel-based Macs, including those with removable batteries and desktop models. Apple’s support site has a full guide to the S.M.C.

Alt on mac