Target Display Mode won't Work
I can't seem to get Target Display Mode to work with my MacBook Pro 2019 and my iMac Late 2013. I have used the authentic Apple Thunderbolt 3 to Thunderbolt 2 adaptor and the Apple Thunderbolt 2 cable but after logging in to both Macs and pressing Command+F2 nothing happens. The connection through the cables work as I can still share the screen through Finder. Specs for the devices are:
MacBook Pro (15-inch, 2019)
MacOS Mojave Ver 10.14.6
2.4 GHz Intel Core i9
16 GB 2400 MHz DDR4
Radeon Pro 555X 4 GB
Intel UHD Graphics 630 1536 MB
And
iMac (27-inch, Late 2013)
OS X El Capitan Ver 10.11.6
3.2 Ghz Intel Core i5
16 GB 1600 MHz DDR3
NVIDIA GeForce GT 755M 1024 MB
MacBook Pro 15”, macOS 10.14