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How do I reset the graphics on my Mac?
- Shut down your Mac.
- Locate the following keys on the keyboard: Option, Command (⌘), P, and R. You will need to hold these keys down simultaneously in step 4.
- Turn on your Mac.
- Immediately press and hold the Option-Command-P-R keys. You must press this key combination before the gray screen appears.
- Release the keys.
How do I reset the SMC on my iMac?
How to reset the SMC on Mac desktop computers
- Choose Apple menu > Shut Down and wait for your Mac to shut down.
- Unplug the power cord.
- Wait 15 seconds.
- Plug the power cord back in.
- Wait 5 seconds, then press the power button again to turn on your Mac.
How can I connect an external monitor to my iMac?
You can connect one external display to your Mac using either of the Thunderbolt / USB 4 ports. On iMac and Mac mini, connect your display to either of the ports with the Thunderbolt symbol .
How do I set an external MAC as my primary display?
To set a different display as the primary display, drag the menu bar to the other display. The primary display is where your desktop icons and app windows first appear. Make sure that your external display is turned on and connected to your Mac. Choose Apple menu > System Preferences, click Displays, then click the Arrangement tab.
How to find out how many external monitors your Mac supports?
To find out how many external displays your Mac supports, check its technical specifications: 1 Choose Apple menu > About This Mac. 2 Click the Support tab. 3 Click Specifications. 4 On the webpage that appears, the number of displays your Mac supports appears under Video Support or Graphics.
How do I Disconnect my external display from my Mac?
Choose Apple menu > About This Mac. Click the Support tab, then click Specifications. On the webpage that appears, the number of displays your Mac supports appears under Video Support or Graphics. Disconnect the cable from your external display from your Mac, then reconnect it.