Extend MacBook display on iMac
Hi,
I'd like to use my iMac (21.5-inch, 2009) to extend the display of my MacBook Pro (Retina, 15-inch, Mid 2015). Is this possible?
I tried a mini DisplayPort to HDMI adapter out of the iMac, connecting to HDMI on the MacBook, but there wasn't a single sign of connection.
Any ideas/help much appreciated!
MacBook Pro 15", macOS 10.13