The first thing to know is that they only work on Yosemite, and only with NVIDIA drivers. Currently available cards are the GTX 750 (Ti), the GTX 970 and GTX 980. In 2014, NVIDIA has launched a new range of graphic cards, using a low-consuming GPU called Maxwell. There is a command line to type to enable the loading of unsigned drivers, and it is necessary.īe careful, the modification disappears if you reset the PRAM and it can cause problems if your machine has a dedicated graphic card. So if you manually modify a driver, it will no longer work. Apple added a new security to its OS : a driver signing. The handling requires to modify some drivers at every minor Mac OS X update and you have to connect an external display to make it work.įirst important point, Yosemite. I advise you in this case to use the same brand (AMD or NVIDIA).
I have only tested on Intel IGP-equipped machines, but apparently it also works with Macs equipped with a dedicated graphic card. I use a Vidock 3 ExpressCard, a Sonnet Expresscard and a Thunderbolt cable, all on a MacBook Air. The operation is pretty close to what I presented, but Yosemite and the latest NVIDIA cards require some adjustments.Ī (quick) reminder : Using an external Thunderbolt GPU requires a PCI-Express adapter and (optionally) a power supply. If you read the reviews, you saw that it is possible to use the latest generation of NVIDIA cards with a Mac running under Yosemite.
