Review on 🔌 Cable Matters 4K Mini DisplayPort to Mini DisplayPort Cable in White 3 Feet - Thunderbolt Incompatible, Excludes iMac & Target Display Mode Support by Darth Naubert

MacBook Pro 2015) is the cable you need. It took me a while (and a few failed attempts with other cables) to find this one and it works great. You can toggle (using the F2 command on your iMac) to switch between an external (and extended/dual) monitor for your MacBook and the iMac's home screen (for use as a standalone iMac or as a multitasking app on your iMac, while doing something else). your MacBook). VERY practical and helpful. And this cable is great for the job. [Warning: If you have a more modern iMac and/or MacBook you will probably need a Thunderbolt cable, but the ONLY will do for older versions)