Purchased some years ago used it for a few weeks and upgraded, works fine as it should ...just tested it in my mac pro tower AOK.
About this product
Product Information
If
you're an artist, designer, or video professional with an Apple Mac
Pro, you can accelerate your entire workflow with the NVIDIA Quadro 4000
for Mac graphics solution. Delivering excellent graphics performance
across a broad range of design, animation and video applications, Quadro
4000 for Mac allows you to do more, faster.