Jump to content


  • Content count

  • Joined

  • Last visited

About supermartin

  • Rank
    InsanelyMac Protégé
  1. I have sent you a PM. Would very much like to get this solved
  2. Nope sorry, I haven't made any progress Sorry about the late reply.
  3. Unfortunately I don't have the LCD driver board anymore :/ I guess I should start looking for a defective 2012 27" iMac. I have the system up and running. It's working somewhat fine if I delete the kexts, but it only runs at 1.6GHz :/ For normal everyday use it's alright, but running demanding stuff just isn't possible.
  4. I only installed Clover based on suggestions in this thread. I have removed it since. I don't have that wire can't remember if that was present on mine. Fairly sure it only slowed down when the screen was removed, and that there was a thermal sensor on the LCD driver board. Is that picture from a 2012 iMac?
  5. Is it possible to upgrade the CPU in an iMac? I mean since it's socketed, it's doable, but I'm unsure if there's anything in the software that prevents one from doing it. Would be nice to install a 3.4GHz i7 at a later point I should get all the parts tomorrow, including the Mac Pro tower. So I can finally start putting this together
  6. Hi, thank you very much for the suggestion. Unfortunately I don't have the frame from the computer anymore. It was completely bend and busted from hitting the floor Had that not been the case, then I would probably go for a replacement screen, since they are pretty good screens as well I have ordered 2x 8GB RAM today, and as I mentioned earlier a friend of mine has acquired a Mac Pro tower that I can build it into. So I'll proceed with that. As far as I can tell it's running the desktop perfectly fine, I'm just not too sure about the applications that relies heavily on the GPU. But that's not really a huge problem for me. I would also like to thank spakk for mentioning and getting me to try SSD Fan control again. While I don't like the configuration interface at all, this program start up before logging in to the computer. This means that the fan will never reach max speed, even if I leave it at the login screen. This solves an otherwise annoying noise problem
  7. Hi, haven't had much time to play around with this for a little while. I haven't really made any new progress, but I managed to clarify a few things. Last week I bought a new Macbook Pro 15", the one with dedicated ATI GPU and 2.5GHz i7. Its quite nice and I like it a lot. I tried running the CompuBenchCL test on it, and realized that it was stuttering pretty bad on it too, although not as bad as it's clearly more powerful. This is apparently normal behavior for this test, because the Macbook Pro runs everything else with ease This led me to believe that maybe the processor in my iMac wasn't running at a lower clock speed after all. The program Intel Power Gadget gave me that idea because it said 1.6GHz. I have now tried macCPUID (which is also Intel) and HardwareMonitor, both says that the CPU runs at 2.9GHz I also tried the Intel Power Gadget on my new Macbook, and while it did display the correct clock speed, the program was doing all kinds of messed up things, so I think its safe to assume that the program is buggy and that's what lead me to believe the CPU was running at approximately half speed. Makes sense as I couldn't feel any problems while using it for web browsing. So is the GPU running too slow? Well, it's hard to say. It ran the T-rex scene perfectly back when I tested it with the original screen attached, but that could have been a much older (less demanding version of the benchmark program), and it could also possibly still be the smaller amount and slower RAM. Don't know, will have to do more testing
  8. There's nothing inside the cable unfortunately. And of course I have thrown away the LCD logic board long ago, so I can't check I guess the easiest solution would be to get a logic board from a broken 21.5" screen and just install that inside the case That would of course mean that it would render 3 displays at once (I have two hooked up to it). I don't remember if you can disable the built in iMac screen altogether, but either way it should still be a noticeable performance increase compared to what I have now Haven't had time to check why Clovers auto config failed. I haven't forgotten though And thanks everyone who posted in this thread so far! I didn't expect so much help
  9. That was the very first thing I tried It only lowered the fan speed. It had no effect on the performance issues :/
  10. I forgot to mention that I tried that. But it failed :/ I can't remember the reason why, but I can check later.
  11. Hmm I'm stuck. I really have no idea what I'm supposed to configure in clover :/ I got clover installed to an EFI partition and I can boot from that (after disabling all ACPI options). I got Clover Configurator installed, and I got the DSDT.aml file extracted, and put it in EFI/CLOVER/ACPI/patched/ (attached to this post). I've tried various CPU and GPU settings but they haven't helped. After booting with Clover the CPU frequency changed from 2.9GHz to 2.89 so I tried changing that. Not really sure what "Bus Speed kHZ" means, and reading about in the clover wiki didn't make it any clearer for me. So I chose not to touch that setting. Again, any help will be greatly appreciated. I feel like I've yet again moved a step in the right direction I assume Clover works, since the iMac is now identified as a Mac Pro DSDT.aml.zip
  12. Yes I have. Thanks for the suggestion though I tried following the guide I posted above to create a bootable Yosemite USB drive that should work for old Mac Pros, but that didn't work for me. I managed to install Clover on an EFI partition, and I've managed to trick the iMac into thinking it's a Mac Pro 3.1 For this to even boot I had to disable all ACPI options, so not sure if it's gonna help anything. I still don't have any improvements in performance, but again, I'm not really sure what I'm supposed to enable here Perhaps I should try to extract a DSDT file from my Mac if possible? Wouldn't that make it a whole lot easier? But as I understand I can't do this on Yosemite: http://www.rampagedev.com/?page_id=70 So for this I would have to reinstall my Mountain Lion image as far as I understand.
  13. I found this: http://forums.macrumors.com/threads/2006-2007-mac-pro-1-1-2-1-and-os-x-yosemite.1740775/ Maybe it will work, even though the iMac already has a 64bit bootloader? As long as it ends up working perfectly, all hardware works as intended, and I can install every update with little hassle I don't really mind how it's achieved
  14. Would that maybe solve my performance issues? Honestly I wasn't aware that you could install clover on original hardware I'm ready to try anything, as I already have the harddisk backed up at various stages of the project
  15. As I said, I already got it up and running, and there are noticeable problems. Removing the screen makes this not so plug and play anymore, so some fiddling with kexts appear to be absolutely necessary (as described in detail above). I do have a power button soldered to the power supply as you can see here (left of the harddrive): http://s40.photobucket.com/user/Konsolkongen/media/DSC_0618_zps8ujhxs9l.jpg.html?sort=3&o=0 Should get a Mac Pro tower next week