Will a GTX 1050 Work on my Mac Pro?

NO! Be warned.

It won't work, unless APPLE helps Nvidia supporting driver development for the new GTX 10x0 / Pascal Architecture.

What WORKS:

Instead I recommend to put one (or two) nvidia GTX 980ti or a titan X black into your MacPro (google how to "980ti in mac pro"). They are offered by macvidcards. You also need OS X 10.11 or 10.10 (not Sierra!) and later Nvidia Webdriver for Mac. I run several MacPros with this multi-GPU constellation, runs very nice.

There is a big community of Nvidia/Mac addicted waiting since 6 months for Apple and Nvidia releasing drivers with Pascal/1050/1070/1080 and Titan X PAScal support. Both Apple and Nvidia are "in charge"... unfortunately not able to support this newest pascal architecture (maybe because Apple focuses on AMD?).

See also:

https://forums.geforce.com/default/topic/978078/geforce-1000-series/when-if-ever -can-we-expect-supported-drivers-for-mac…

and, hey apple – look into this forum thread too. you'll see there are a view apple/nvidia loyal people, hungry for pascal.

And as an add-on to Ilias comment:

The good news is, that GTX980ti series as well as the titan X (Maxwell) is not on the list, but is inofficially supported by nvidia!!! (OS X 10.11); see also macvidcards.com.

All you have to do is install the latest nvidia mac web drivers for quadro, after installing the card it will work.

http://www.nvidia.com/download/driverResults.aspx/105589/en-us

Nevertheless: Current GTX 10x0 series is not supported. Neither inofficially nor officially. Sad but true.

Apple does not use Nvidia hardware any longer. The last Nvidia option AFAIKT was 2014 iMac, it's all AMD ATI now and it may have something to do with the 9xx recalls that cost Apple a lot of bad PR.

According to new reports, Nvidia are about to finally release beta drivers for their 10 series cards! Wahoo

Yup you're right nvidia have done so- what a difference a day makes!

Nvidia has released Mac Drivers with Pascal support:

http://www.nvidia.com/download/driverResults.aspx/105589/en-us?ClickID=dsyskkkm2 xoxwc2owz2wkocnycnyzcz2oymy

Quadro & GeForce Mac OS X Driver

could you be a little more specific as to which Quadro driver ?? Thanks in advance ..

hi

Wich drivers did you use , because i try it on my mac pro 4.1/5.1 and every time it reboot with the OS X default drivers

WHAT DO I HAVE TO DO TO PUT A VIDEO CARD TO MY MAC?

You must have a Mac pro 5.1 or less and now on 10.12.6 you can use AMD polaris gpu.

Or in other macs use Egpu with thunderbolt

Does the GTX980ti or Titan X have to be flashed??

Thanks for your help.

I have bought a 1050ti 4gb, and apart from boot screen, everything works just fine!