A couple Mac EFI news

A user of our forum MacEfiRom released a couple of tools for macs:

1) Upgrade utility to upgrade imac4,1 firmware to imac5,1, this allows you to upgrade imac4,1 with core2duo cpu and install more than 2GB memory, so you can install and use Lion on it
2) Upgrade utility to upgrade 2006 MacPro1,1 with firmware of MacPro2,1, this brings support for some CPUs to MP1,1
3) Tutorial for installing Chameleon on a Mac, so you can boot 64-bit kernel on a Mac with 32-bit efi and 64-bit cpu.


  1. tehg33k
    September 9th, 2011 | 1:51 am

    will this become available for the MBP’s?

  2. LoLL
    September 9th, 2011 | 1:01 pm

    Old MacPro will start to be moreeeee interesting on 2nd and market 🙂

    Btw nice trick !

  3. Someone
    September 9th, 2011 | 6:29 pm

    Whoa, I always thought the early 2006 and late 2006 Macs had a different chipset, which is what prevented >2GB even with a Core 2 Duo upgrade. Nifty stuff!

  4. Someone
    September 9th, 2011 | 6:53 pm

    Also, would it be possible to do the same for Mac Minis?

  5. Sascha_77
    September 10th, 2011 | 11:58 am

    The Sound-Problem is fixed. Look at the forum on my last post.

  6. tiger
    September 12th, 2011 | 3:26 pm

    Any chance for Geforce 570 ? 🙂

  7. Sebastien
    September 20th, 2011 | 3:51 pm


    Would it be possible to upgrade the firmware of macmini 2006 for user having upgraded to a c2d ??
    Would be nice, there is a lot of macmini cd upgraded to c2d.
    Thank in advance

  8. Robin Savage
    October 10th, 2011 | 11:20 am

    Dear Netkas

    Please would it be possible to provide me with a link to download macEFIrom’s iMac4,1 to iMac5,1 Firmware Tool that was posted on your forums in September? I have tried to register with your site on 26th of September but i still have not been sent an activation code or anything so i cant access the forums or download this very useful utility.

    Your help would be much appreciated

    kind regards


    ///what’s ur nickname for forum?

  9. Erik
    October 11th, 2011 | 6:59 pm

    Would someone please activate my forum membership? I’ve been trying to use this firmware flash to possibly repair my flakey mac pro on the old 1.1 firmware. I’ve registered but still have not been activated, I’m just trying to get the upgrade utility for my mac pro.

    What’s ur nickname?

  10. PeterHolbrook
    October 12th, 2011 | 12:23 pm

    I’ve been trying to download the “Mac Pro 2006-2007 Firmware Tool”, but I can’t find a valid link to it anywhere? Has it been withdrawn? I can I download it?

  11. frantisheq
    October 13th, 2011 | 12:04 am

    any chance for doing this with early 2008 white macbook4,1?

  12. max
    October 19th, 2011 | 8:05 pm

    Please, please, please activate my user for the forum – I’d like to download the iMac Upgrade tool for my iMac4,1 – nick is max or jump

  13. max
    October 19th, 2011 | 10:04 pm

    Where can i download the iMac Firmware Tool ? Registration in forum is still pending. Nickname max.

  14. KAmil
    October 29th, 2011 | 10:57 pm

    I have macbook air1,1 , can i install firmware to have 4 gb ram

  15. Brill
    November 21st, 2011 | 10:18 pm

    Where can i download the iMac Firmware Tool ? Registration in forum is still pending.

    Nickname Brill

    ///pendings no more

  16. Joomla
    December 17th, 2011 | 4:00 pm

    Registration in forum is still pending

    Nickname Joomla


  17. BigBrother
    January 24th, 2012 | 10:23 pm

    Would it be possible to activate my account? I’m trying to download the 1,1->2,1 MP tool.

    Username is BigBrother

    Can’t wait!

  18. jimbo
    January 26th, 2012 | 2:50 am

    My registration is still pending too and would really like to update my aging mac pro 1.1
    My nickname is jimbo


  19. connie
    April 10th, 2012 | 3:16 am

    Hi ar , Can u give me a help ?
    Your account is still awaiting admin approval.

    login name : connie


  20. oboe
    May 3rd, 2012 | 5:34 am

    Hi there.
    My registration is also pending. I would really love to try to update my mac pro 1.1

    My nickname is oboe


  21. Wun
    May 12th, 2012 | 12:59 am

    Any idea why the upgrade wont work for me? I just installed 2 X5355’s and my mac is giving me the red CPU LED lights in the ram bay. After observing the CPUs. They both have some small gashes on a contact or two.

    Before I saw the damage on the back of the CPU’s, I thought maybe I’d upgrade my 1,1 2006 to a 2007 with this utility. But when I restart for the upgrade, the white apple screen pops up for 1 second and immediately restarts. This is after reinstalling the original processors.

  22. Fugda
    May 19th, 2012 | 4:24 pm


    Could someone please validate my registration as I can’t seem to be able to find a download link for this tool. My nickname is fugda. Thanks

  23. fugda
    May 21st, 2012 | 11:05 pm


    I’ve just upgraded the cpu’s in my 1.1 mac pro to 2 x 5255 xeons and I’d love to be able to download this tool. My registration is pending nickname fugda. Thanks in advance!

  24. norman49
    July 23rd, 2012 | 8:40 pm

    Could someone please validate my registration as I can’t seem to be able to find a download link to upgrade my MacPro 1.1 to 2.1l. My name is Norman49.


  25. Christopher McKay
    September 30th, 2012 | 2:22 pm

    pending. nickname: 1kredhead

  26. Dapbnh
    October 3rd, 2012 | 8:38 pm

    Need download link please! Registration activation have not received yet. Nickname: dapbnh

  27. Dapbnh
    October 4th, 2012 | 4:59 pm i guess won’t respond to yahoo emails, i used my company email and got confirmation right away! Thanks for the utility really helps!

  28. March 12th, 2013 | 5:27 pm

    Hi! Just stumbled across this site and I believe your firmware utility would help me. I hav kernel panic on my MacPro 1.1 about 4-6 times a day after upgrading to an 8 core processor.
    What do I need to do, in order to get a link to this utility? thanks.

  29. March 12th, 2013 | 6:45 pm

    HAve solved it! Joined the forum, downloaded and installed the 2.1 firmware – all looking good. will report after longer testing, if the problem is solved.

  30. oelbert
    August 10th, 2013 | 7:16 pm

    I can’t find a download link to upgrade my iMac4,1 My name is oelbert

  31. KS
    August 22nd, 2013 | 2:25 pm

    I would like to rewrite ROM of HD5770 and to enjoy MacPro.

    login name : KS


  32. KS
    August 25th, 2013 | 9:53 pm

    My registration is still pending too and would really like to update my aging mac pro 1.1
    login name : KS

  33. KS
    August 25th, 2013 | 10:12 pm

    My registration is still pending too and would really like to update my aging mac pro 1.1
login name : KS

  34. KS
    August 28th, 2013 | 4:27 pm

    Appreciated The forum Team.

    Pleasant MacLife could be seen.


  35. SteveC
    January 8th, 2014 | 5:24 pm

    Any change I can get my registration approved?


  36. SteveC
    January 13th, 2014 | 8:52 pm


  37. KDUR
    April 1st, 2015 | 11:06 pm

    question: not a real apple genius here but… can i use this tool to upgrade the RAM even if i don’t upgrade the cpu to core2duo?

  38. jab
    October 24th, 2015 | 6:45 am


    me too,

    nickname: jabberman



  39. jab
    October 24th, 2015 | 6:46 am

    @KDUR No, you´ll have to update your CPU.

  40. jitnyu
    October 24th, 2015 | 4:12 pm

    Hi my name is jitnyu and am looking too to extend my imac 4,1’s life. can you please approve my forum registration? 🙂


  41. Luis
    October 27th, 2015 | 8:09 pm

    Still waiting on my account activation email so I can download the firmware update. Any way I can be sent the email ?


  42. kaeru
    November 3rd, 2015 | 7:52 am

    Also waiting for activation in order to download macpro 1,1 firmware update utility. Thank you !


  43. trand300
    November 6th, 2015 | 8:46 am

    I am still waiting on account activation email.

    Thank you.


  44. Tim
    November 7th, 2015 | 3:48 am

    It seems this forum is dead, there is no way to register.
    I would love to find this firmware upgrade somewhere…


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