Your MacBook’s Display Resolution is Wrong Because You Forgot to Power On Your External Monitor


You boot up your MacBook with an external monitor attached, but you forget to turn on the monitor. You turn on your external display, but your MacBook is already booting. When everything is all booted up, your external monitor is at the wrong resolution — 800 X 600. What do you do?

First of all … you don’t have to reboot your MacBook.

Just go to the Apple menu and select ‘System Preferences …’

Select ‘Displays’ from the ‘System Preferences’ window that pops up

Another window pops up that probably has the name of your external monitor in the title bar

Click on the ‘Detect Displays’ button from that last pop up.

Done. Your external display will get back to its optimum resolution.

Search Amazon …

Search for products sold on Amazon: is an Amazon Associate website, which means that a small percentage of your purchases gets paid to at no extra cost to you. When you use the search boxes above, any Amazon banner ad, or any product associated with an Amazon banner on this website, you help pay expenses related to maintaining and creating new services and ideas for a resourceful website. See more info at