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Thinking of using my idle iMac as an external monitor for my 2018 Macbook Pro. But not sure how that would work between the Thunderbolt 2/Mini Displayport on the iMac and the Thunderbolt 3 on my Macbook Pro.
Here are the ports on my iMac, as you can see the sign (second last from the right) there suggest it is a thunderbolt 2 port. What kind of cable do I need to use it as a monitor for my Macbook Pro?
MacBook Pro
You need a Thunderbolt 3 adapter
http://www.apple.com/shop/product/MMEL2AM/A/thunderbolt-3-usb-c-to-thunderbolt-2-adapter
and a Thunderbolt (not Thunderbolt 3) cable.
Please read Use your iMac as a display with Target Display Mode for everything required.
How to use an iMac 2011 as external monitor for my Macbook Pro 2018?
