just connected MacBook Pro to external monitor and screen is frozen on homepage

Hi sooze22,

Thanks for the detailed description. This sounds like normal behaviour if your Mac is set to extend displays (rather than mirror them).

If you want both displays to show (mirror) the same content, head to System Preferences -> Displays -> Arrangement, and check the box for Mirror Displays. When this mode is on, both your built-in display and your external monitor will use the same display resolution. This means that one of the displays might not use up all of the screen space.

If you want both displays to be separate from each other, go to System Preferences -> Displays -> Arrangement, and uncheck the box for Mirror Displays. Then, verify that the displays are arranged (on the same screen in System Preferences) in a way that makes sense:

• If your MacBook Pro is physically placed to the left of your external monitor, drag the built-in screen (usually smaller) so that it is on the left side of the external monitor. (Move the cursor past the right side of the built-in screen to use the external monitor.)
• If your MacBook Pro is physically placed to the right of your external monitor, drag the built-in screen (usually smaller) so that it is on the right side of the external monitor. (Move the cursor past the left side of the built-in screen to use the external monitor.)
• If your MacBook Pro is physically placed directly in front of the external monitor, drag the built-in screen (usually smaller) so that it is below the external monitor. (Move the cursor past the top of the built-in screen to use the external monitor.)

Once your cursor is on the external monitor, click anywhere on the screen to use it. The menu bar should bolden on the external display, and become shaded out on the built-in display. (The opposite applies if you then move the cursor back to the built-in display and click on it.)

Hope this helps!