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Trying to use extended desktop or dual displays...

I am so frustrated.

For reference...I have:

iMac (21.5-inch, Late 2015) OS X El Capitan Version 10.11.6

MacBook Pro (13-inch, 2016, Four Thunderbolt 3 Ports w/ Touchbar) macOS Sierra 10.12.6

I like using dual screens for work (an extended desktop? Basically I want to have control of what is on both devices by just using one of them) Apparently my iMac is not compatible with Target Mode display. So, at the suggestion of an Apple advisor I bought a Thunderbolt Cable (that can be used in my iMac) to use with a Thunderbolt to USB-C cord/adapter to plug into my MacBook Pro. When I plug them all in, nothing happens...I also do not have an "Arrangements" tab available to me on either device in the "Displays" part of my System Preferences.

HELP. Is there any way for me to do an extended display? Both of these devices are so relatively new I don't understand how it can't be possible....

最后更新：2017-10-16 10:20:59

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