Flashed Sapphire 4870 in Mac Pro - How to install Snow Leopard and configure it?

Discussion in 'Mac Pro' started by Legolover64, Aug 30, 2009.

  1. Legolover64 macrumors regular

    Feb 24, 2008
    Hi there!

    I have a MacPro3,1. It currently runs 10.5.7, and I use it for development. I bought Snow Leopard on Friday, and I'm worried about installing it. I have a flashed Sapphire 4870 card running in addition to my 2600 XT (stock.) I made the BIOS with which I flashed the card using a python script I found on MacRumors.

    I know the card works pretty well in 10.5.7. I have Dual-DVI, rotation support, and Quartz Extreme working. Sleep does not work (crashes the machine) but I'm pretty okay with that; I seldom sleep the Mac anyways.

    I understand that to get everything working in Snow Leopard, I have to add the device ID to a .kext file that is installed with Snow Leopard.

    I've found the device ID in System Profiler on this line:

    Device ID: 0x9440

    Is this the right line to look for a device ID? Should I be looking somewhere else?

    Also, on http://netkas.org/?p=128, netkas says "just need to add dev-id into ATI4800Controller.kext." for my kind of card. How do I add the device ID to the kext? I think it goes somewhere in info.plist, but I'm not sure...

    Will I still have Dual-DVI? It's very critical that I have it working, so I'd like to make sure before installing the new OS.

    Thanks so much everyone!

  2. netkas macrumors 65816

    Oct 2, 2007
    should work otb
  3. Legolover64 thread starter macrumors regular

    Feb 24, 2008

    If it doesn't end up working out of the box, what should I do? Post back here?
  4. Cindori macrumors 68040


    Jan 17, 2008
  5. xgdlm macrumors newbie

    Aug 12, 2008
    First of all, be sure to be able to recover the old system with an uptodate time machine backup. As stated on an other thread.. I have problem with dual DVI on SL. I put back the leopard CD ROM and choose install from time machine ... everything went well.

    Best solution, the one I have now.. is to install SL on a different drive to make sure everything is OK before crashing your working system.

  6. ManiG macrumors member

    Aug 11, 2009
    The whole benefit of flashing the 4870 is that OSX believes it is a "legitimate" 4870 down to the hardware level. This means you should be able to upgrade the OS and basically do everything without having to worry about drivers, injectors and so on.
  7. gzfelix macrumors member

    Jun 14, 2007
    Charlottetown, PE
    Boot with the SL DVD. If two displays work fine, then SL must work on your graphics card after it is installed.

    Always backup everything so you can go back with Timemachine backups.
  8. TheStrudel macrumors 65816


    Jan 5, 2008
    Had anybody gotten dual DVI to work with non XFX 4870s in Snow Leopard yet?
  9. treo360 macrumors member

    Jun 22, 2009
    yes I have
  10. TheStrudel macrumors 65816


    Jan 5, 2008
  11. treo360 macrumors member

    Jun 22, 2009
    Sapphire HD 4870 512 SKU# 11133-03-20R
  12. Legolover64 thread starter macrumors regular

    Feb 24, 2008
    Alright guys, I decided to just cross my fingers and go for it. I was extremely pleased to find out that everything "just works" exactly like it had before. I'm going to try sleep, but supposedly that has been fixed now too.

    Thanks everyone!
  13. RipperG macrumors newbie


    Aug 26, 2009
    Hey Lenglover, I have the same Macpro as you! I also still have the original ATI Radeon HD 2600

    I have been scouring these Forums for the last 2 weeks and reading about how people are able to upgrade their graphics card in an economical way.

    I am looking into doing the same with either ax XFX card or Saphire in the 1Gig range. To be honest I need it mostly for the Bootcamp partition and it is less important for me to use it for Mac OSX Leopard.

    Having said this, what happens with SNow Leopard if I just pop in one of theses cards without any sort of flashing? Can I tell my Bios to boot with only the ATI Radeon HD 2600 HD and use the new card solely for my WIndows Bootcamp partition.

    Any additional info would be great!
  14. matthewtoney macrumors regular


    Aug 17, 2009
    Charlotte, NC
    Sure, works great on mine - XFX 1GB HFC board flashed.

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