Press and hold down the Power button until the machine shuts down.
- Command-R: Restart into OS X Recovery utility, which lets you re-install, repair, or restore your Mac. Command-Option-R: Restart into the online OS X Recovery utility. Command-Option-R-P: Restart and reset NVRAM, which can help clear up speaker, screen resolution, or startup disk problems.
- Start up the Mac whilst holding down ⌘-S. After a few moments, you'll see the Mac boot to the command line. Before continuing, the filesystem must be checked and mounted, so files are't immediately accessible to interact with. To do this, enter the two commands that are displayed within the prompt, one at a time.
- Mar 21, 2018 I've been having a problem with my MacBook Air and my wireless router, so today I decided to write a script to restart the MacOS wireless networking service from the command line. In short, I use this MacOS command to turn off the Mac networking service: sudo ifconfig en0 down. And I use this command to turn the Mac wireless network service.
How to Force Restart Your Mac Press and hold down the Command (⌘) and Control (Ctrl) keys along with the power button (or the Touch ID / Eject button, depending on the Mac model) until the screen.
A Troubleshooting Protocol to Identify Problems or Fix macOS El Capitan or Later
You should try each, one at a time, then test to see if the problem is fixed before going on to the next.
Be sure to backup your files before proceeding if possible.
- Shutdown the computer, wait 30 seconds, restart the computer.
- Disconnect all third-party peripherals and remove any support software like drivers and plug-ins.
- Start the computer in Safe Mode, then restart normally. This is slower than a standard startup.
- Repair the disk by booting from the Recovery HD. Immediately after the chime hold down the Command and Rkeys until the Utility Menu appears. Choose Disk Utility and click on the Continue button. Select the indented (usually, Macintosh HD) volume entry from the side list. Click on the First Aid button in the toolbar. Wait for the Done button to appear. Quit Disk Utility and return to the Utility Menu. Restart the computer from the Apple Menu.
- Create a New User Account Open Users & Groups preferences. Click on the lock icon and enter your Admin password when prompted. On the left under Current User click on the Add [+] button under Login Options. Setup a new Admin user account. Upon completion log out of your current account then log into the new account. If your problems cease, then consider switching to the new account and transferring your files to it - Transferring files from one User Account to another.
- Download and install the OS X El Capitan 10.11.6 Combo Update or 10.12.6 Combo Update or Download macOS High Sierra 10.13.3 Combo Update as needed.
- Reinstall OS X by booting from the Recovery HD using the Command and R keys. When the Utility Menu appears select Reinstall OS X then click on the Continue button.
- Erase and Install OS X Restart the computer. Immediately after the chime hold down the CommandandRkeys until the Apple logo appears. When the Utility Menu appears:
- Select Disk Utility from the Utility Menu and click on Continue button.
- When Disk Utility loads select the drive (out-dented entry) from the Device list.
- Click on the Erase icon in Disk Utility's toolbar. A panel will drop down.
- Set the Format type to APFS (for SSDs only) or Mac OS Extended (Journaled.)
- Click on the Apply button, then wait for the Done button to activate and click on it.
- Quit Disk Utility and return to the Utility Menu.
- Select Reinstall OS X and click on the Continue button.
How To Shutdown And Restart This Computer
Feb 28, 2018 1:18 PM