Can I connect my MacBook Pro (OS X El Capitan 13-inch, late 2013) to my iMac (27-inch OS Catalina, Late 2015?
I purchased a Thunderbolt Cable (2m) and hit Command F2 but nothing is working. Do I need to use a different cable or HDMI?
Thanks for your help Apple community!
MacBook Pro 13″, OS X 10.11
You do not have a cable issue; your have a "too new" issue. What you are trying is called Target Display Mode (TDM), a technology Apple have deprecated.
Use your iMac as a display with target display mode - Apple Support
Only certain iMacs could be used as an external monitor for another Mac. A 2015 iMac is too new. A MacBook Pro could never act as a monitor for another Mac. TDM was limited to a sub-set of iMacs made between 2009 and Mid 2014.
Dual Screen Q: Can I connect my MacBook Pro (OS X El Capitan 13-inch, late 2013) to my iMac (27-inch OS Catalina, Late 2015)?
