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Helpful answers
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Apr 26, 2011 8:14 AM in response to snaffles22by SP Forsythe,First, what you said is contradictory. You say "can't get a video signal", then say"the Mac wallpaper is broadcast, the mouse pointer is visible". "No video signal" means an absolutely black,blank screen. It sounds like you have plenty of signal.
I am supposing what you are seeing is actually a blank desktop, which is to be expected if your settings are such that you are extending the desktop, instead of mirroring it.
Within the preference panes is a setting that allows you to change this. Open System Preferences, click Displays, and then click Arrangement. You will see that you are extending the desktop. Change that setting.
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Apr 26, 2011 8:20 AM in response to snaffles22by captfred,Or you can click CMD-F1 to switch to "mirror display", click again to "extended desktop".
Regards
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Aug 30, 2016 9:36 AM in response to SP Forsytheby billbrieck,Thank you. This was very helpful! Working fine now.