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I have a 2018 Macbook Pro running 12.0.1 and I am trying to connect it to an old iMac (late 2013, running 10.11.2). My Macbook has no display ports so I currently have the display adapter, connected to HDMI cord, connected to a Mini Display Port adapter that is connected to the iMac. Command f2 is doing nothing. Is there anything else I can try?
Did you read this?
iMac models introduced in 2011, 2012, 2013, and mid 2014
To use any of these iMac models as an external display:
or Thunderbolt 2 cable.Did you read this?
iMac models introduced in 2011, 2012, 2013, and mid 2014
To use any of these iMac models as an external display:
or Thunderbolt 2 cable.Just purchase a lower-price point 32-inch display offering an HDMI port and purchase a USB-C to HDMI 2.x cable, or If you can find a lower-cost 4K UHD display with HDMI, then Belkin makes a USB-C to HDMI 4K HDR adapter and use the aforementioned HDMI cable.
+1 on Jack-19's accurate advice. If the MBP needs an external display, please buy one you will be much happier. That solution is less expensive (does not require expensive cabling), is dead reliable, and is simple to setup. Target Display Mode is no longer supported and has not been for years now.
Are you sure you're pressing Cmd+F2 on iMac? I have 2019 MBP with Big Sur and old 2013 iMac with Catalina and TDM work fine with this pair (with a caveat). I actually find this post researching if I'm gonna loose TDM if I upgrade to Monterey.
Even though they say your other Mac must have Catalina or earlier, that's not entirely true. I use TDM with Big Sur on my 2019 MacBook Pro all the time. I guess it's just "not supported" anymore. There is a caveat though: quite often after pressing Cmd+F2 the iMac does not turn it's backlight. Turning TMD on and off several times helps. Also I didn't manage to get the sound working through TDM (I think it wasn't working on Catalina either).
Welcome to the Apple Support Communities.
Sorry, no. macOS Monterey does not support Target Display Mode.
Jack
Thanks all. Was moreso hoping to make use out of our old iMac that’s otherwise useless at this point.
How to use Target Display Mode with late 2013 display iMac with 2018 Macbook Pro
