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38 of 38 people found the following review helpful
I have a dual-quad 2.26ghz Mac Pro and was using it with the 4870 card from Apple. It's a great box, even as it's approaching 4 years since I bought it, but the video capabilities of the 4870 were showing their age BADLY.

Like many Mac Pro users, we're on pins and needles waiting for Apple's newest system. Since it looks like it's going to be a while still, I wanted to bump the older system up and move the new card to the new Mac Pro when it comes.

My impressions of the 7950:

The card is a very nice looking white, full-length card, but is slightly shorter than the 4870 card it replaced. Packaging is on a par with what you'd expect with a commercial product. It came with a well-written users manual, a PC driver disc, a Mac OS X disc, two power cables (the card draws too much power to be powered only from the PCIe bus) and some random bits of paper.

Installation was very easy. Be sure to read the manual, because it will ask you to install the driver software FIRST. It's very simple, launch the correct installer for your OS (either Lion or Mountain Lion), reboot the system. After reboot, I shut the system down, removed the power cable from the back of the system, cracked the case, removed both power cables from my 4870, removed the card retention device, slide out the old card, blow out any dust, install the new card, replace the card retention device, reattach the internal power cables (or if you're upgrading from the stock card, install the supplied power cables in the sockets inside the system and attach them to the card, making sure they're firmly attached and click into place). After that, close the case, reattach the main power cable and power the system up.

The system worked without any changes or reconfiguration. I noticed immediately that showing the open windows and desktop in Expose were greatly faster than before. I brought up some OpenGL apps and they were spectacular. I was able to go to the highest detail level on games like SecondLife and everything was very snappy.

I've not noticed any increase in background noise moving from the 4870 to the 7950, but I also have 50+ year old ears.

I'm very happy with the 7950 card and consider it money well spent breathing new life into an aging system.

Update: (Aug 1, '13)
Now that we've all learned of Apple's plans for the Mac Pro, I'll be keeping this card where it is and use it for Final Cut Pro rendering and experimenting with OpenCL. I don't regret this purchase in the slightest, since it's make my 2009 Mac Pro extremely usable again.

Update: Dec, 2013
I've noticed that i was having many more kernel panics that were related to the video driver chain after I'd upgraded to Mountain Lion, once i went to mavericks, the crashes went away, but then I'd noticed sluggishness related to video. After 10.9.1 came out, all of the stability issues remained gone and performance was once again what it was before. I highly recommend upgrading to Mavericks.
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12 of 12 people found the following review helpful
on December 31, 2013
Despite what the product details say, I found plenty of other information that this card works with the earlier MacPros. I recently upgraded to Mavericks 10.9.1. I installed the card, fiddled for a while getting the two power leads connected, and then powered up by MacPro. Kept my fingers crossed and it all worked fine. No software to install - all the drivers seems to be there with Mavericks.
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11 of 11 people found the following review helpful
on February 5, 2014
Installed on a 32GB Mac Pro (early 2008) with dual-quad core 2.8 GHz processors and OS Mavericks 10.9.1. No flickering, etc. X-Plane 10 is screaming fast with all the settings at maximum. According to AMD/Radeon - it doesn't work in this machine - wrong.
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10 of 10 people found the following review helpful
on June 6, 2013
I installed this in my MacPro 2009. Easy installation, great performance boost over my 5770 and of course over the original Nvidia GT120. If you don't toggle the little switch (PC/Mac) to Mac, it still works fine, you just don't see the gray boot screen with the Apple logo. Toggle the switch and all is well.

Long term update after 18 months: had to remove it from my MacPro. It appears to lose sync randomly and that is very annoying. I removed it from the Mac and tested it in a PC and the same problem occurs. This card is now in my scrap pile.
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5 of 5 people found the following review helpful
on January 17, 2014
I'm sing the HD 7950 to power a Seiki 39" 3940 X 2160 @ 30 Hz using a mini display port to HDMI active adapter, anApple 30" display using the d/l DVI port @ 2560 X 1600 @ 60 Hz & a ViewSonic 28" that is a 1920 X 1200 display but under Mac OS 10.9.1 it will convert the display to what it says is 2560 X1600 through the HDMI port. All of this with no problems. I'm also running anATI 3870 to run an HP 30" 2560 X 1600 display & a Sharp 10809 screen with the Displays panel saying that it is 2560X 1440. So like others here I have 1 splitter to run the 3870. This is all in a 2012 Dual 3.06 GHzMac Pro.

I tried to see how the HD 7950 would work under Mac OS 10.6.8. It would not power the 3840 X 2160 display but would power the Apple 30" & the ViewSonic 28" displays without a problem. I never tried to install any drivers with OS 10.6.8 & the word is that after OS 10.8.2 or maybe OS 10.9, no drivers are needed to be added. I would believe 10.9 as the card ran theUltra HD display correctly but tried to make it a 1960 X 2160 display & was totally unreadable. I did not downgrade the video card for this as I did not follow the directions & load any drivers.

Another person did not like the card because it would not power 4 displays even though it has 4 video output connectors. The directions actually says on all ATI video cards that they will only run 2 displays. But 3 is an advertised number if active adapters are used. As I only have 1 screen that has a display port on it & it doesn't like to work all of the time I have nothing to connect without an adapter to the Mini display port connectors without an adapter. So 3 is possible & 3 that is in general larger than 1920 X 1200.

Try it you'll like it. I'd recommend Mac OS 10.9.1 as another has said as this worked best. OS 10.8 will do & contrary to the Sapphire advertised it will work under Mac OS 10.6.
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6 of 6 people found the following review helpful
on October 25, 2013
I purchased this product because it was one of the few video card options I had to upgrade my Mac Pro (mid-2012). The card is a little expensive for what it is, but when you need something Mac compatible you pay the price. I currently use this card primarily for video editing and graphics creation and it has given me a good boost in performance. I would recommend this to anyone working with Premiere, FCPX, or After Effects who wants a bump in their Mac Pro's performance.
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5 of 5 people found the following review helpful
on October 11, 2013
Bought this card when a GTX680 would not work with my Apple Studio Display. The 7950 works perfectly with my hardware.
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12 of 15 people found the following review helpful
on April 30, 2013
Great card, works for my purpose but has a few things you should be aware of...

First, it takes TWO PCIe power cables, meaning if you are like me and have more than a couple monitors (I have 4) then you will have to get a 6 pin PCIe power splitter to make more than one card work.

Second, since I did not yet have the splitter I tried this on 4 monitors, then three then just two of my Mac 27" 2012 monitors and it pixilated like crazy, it could not handle the resolution of two high end monitors, let alone 4. It WILL drive 4 but if you do anything graphical forget about it, if you are just surfing it might be fine.

The fan is quite loud when running on a load, but it is very good about powering down properly as your graphic needs on that card decrease, I was very pleased with that and the heavy duty construction of the card. I think this is the best card on the market right now for Macs, far better than the NVidia junk that is out there that I have now gone through four of them (and at $400 each that's not cheap to do).
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3 of 3 people found the following review helpful
on March 27, 2014
I was hesitant to buy this card, since it says it requires a Mac Pro 4,1 or 5,1 but I'm glad I did. I pulled out my trusty Radeon 5870 and popped this 7950 into my Mac Pro 3,1. I had no issues setting it up in OS 10.9, 10.6 and Windows 7. I was very pleased to see that frame rates went through the roof in my favorite (full screen HD) games. My one and only complaint is that the fan is just slightly louder than the 5870 was. Overall, two big thumbs up!
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6 of 8 people found the following review helpful
on May 11, 2013
After installing the card, I got no improvement in performance - until I turned the settings of the test programs and games up to maximum! I'm now able to use the highest settings for all my games, both in MacOS and Windows, with no difficulties and great performance! Easy enough to install, my only regret is that it is so small that it does not lock in place like previous cards.
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