Strange Colors? Switch to a Different Profile Typically, most Macs produced after 2013 are capable of supporting this resolution, but if you’re unsure, you can check your Mac’s technical specifications for more information.Īlso read: The Definitive Monitor Buying Guide 15. If you’re using a 4K external display, then there’s no guarantee that your graphics card will be powerful enough to push all of those pixels to the 4K display.
#HDMI NOT WORKING MAC MOJAVE MAC#
Using 4K? Make Sure Your Mac Is Compatible! If your MacBook has the T2 chip, you’ll need to use the Shift key on the right side of your keyboard in addition to the other keys.ġ4. Press and hold the Control + Shift + Option keys and the “Power” buttons for 10 seconds, then release all four keys at once.Make sure your Mac is completely switched off.(You can skip this step if you have an M1 Mac, as Apple Silicon Macs don’t come with an SMC.) The System Management Controller (SMC) is a chip that controls many of your Mac’s physical components, so resetting SMC can resolve certain display-related issues. You’ve now successfully reset your Mac’s NVRAM and can check whether macOS is playing nicely with your external display.Īlso read: Everything About Apple Silicon and the M1 Chip That You Need To Know 13. If you want to enforce this check, shut down your Mac and restart it after a few seconds. The system automatically checks whether a reset is required during startup. M1 Macs don’t have a keyboard shortcut to reset NVRAM. Hold these keys until macOS restarts, then release them. Power up your Mac and immediately press the Option + Command + P + R keys.ģ. If these settings become corrupted, then it can cause a range of technical issues, so resetting your NVRAM may resolve the issues you’re experiencing with your external monitor.īefore we begin, be aware that resetting NVRAM will also reset your system settings and preferences, so you may need to spend some time reapplying these settings following an NVRAM reset.Ģ. Non-volatile random-access memory (NVRAM) is a small amount of memory where macOS stores all the settings it needs to access quickly, including some settings related to the display. Resetting NVRAM: Wipe Your Non-Volatile RAM