Howsit all So after MUCH tampering, frustration and reading I finally got my Mountain Lion to work with my Biostar A780L board and AMD Athlon X2 CPU. This guide will be long because its a very new-person (I don't like the word noob) friendly guide that outlines exactly each step that needs to be taken. Firstly things to take into consideration. This WILL take time. This COULD be frustrating. You COULD run into many different errors and cry. It took me over 70 hours to just get it to work. For some reason, the same flags produce different results. Literally. So MAKE SURE you have time to do this. This is not a "one night I am bored lets install MAC it should only take an hour" thing. It will take a lot of our time. This is also certainly NOT for people who give up easily. I've been trying to get MAC onto my highly incompatible board for over 6 months now. I finally did it. My system specs are as follows, just for extra info: Biostar A780L motherboard AMD Athlon X2 @ 3.3Ghz ATI HD 5770 GPU 4Gb of DDR3 RAM 2 X 160GB SATA HDD This guide is STRICTLY when using 2 different hard drives for each OS. I am not clued up on how to dual boot Mac and Windows on ONE hard drive. Okay so let's get started. Firstly you will need the following: A WORKING Hackintosh, be it an actual hardware based Hackintosh or a Virtual Machine. The version of the hackintosh doesn't matter (so I think). I used Snow Leopard 10.6.0 A USB drive, 8Gb free space. iAtkos DMG for Mountain Lion: Official iATKOS Forum ? View topic - iATKOS ML2 (Mountain Lion 10.8.2 PC) iAtkos boot loader: http://iatkos.me/wp-content/uploads/2012/12/pkg/ML2_Bootloader_Installer.pkg.zip amd_kernel: Mountain Lion kernel testing on AMD (don't ask help here: use the Help Topic) - AMD Development - InsanelyMac Forum EasyBCD: Download EasyBCD Community Edition 184.108.40.206 Free - A handy tool for tweaking your system - Softpedia Lots of patience and quite a bit of time. Okay so let's get started. First make sure the DMG for iAtkos ML2 is on your desktop. Either download it using the Virtual Machine or if you downloaded it using windows (like I did) transfer it with the flash drive you're going to use. *If you're using a VM make sure the flash drive is available to the virtual machine by going in VMWare -> Settings -> USB and click the tiny plus and add your flash drive to the list. Make sure its enabled in the list. Boot into your hackintosh and format the USB drive using Disk Utility. Format the drive using GUID Partition Table (GPT) and call the partition Install, or something thats easy to remember and type. Once that has been formated mount the iAtkos DMG you downloaded. Go into disk utility again and click on the partition you just created (Install should be the name, or the name you chose). Now click the restore tab. Drag the iAtkos CD icon into the "Source" block (the icon would be a little silver A like symbol). Drag the install partition to "Destination". Untick the "Erase" option. Let that run. Depending on your PC it will take around 20 minutes to an hour. Once it is done don't close anything yet. Copy the amd_kernel you just downloaded to the ROOT of your iAtkos USB drive. To make sure its in the same place as mach_kernel make sure hidden files are visible using this command in terminal: defaults write com.apple.Finder AppleShowAllFiles YES killall -KILL Finder Open up finder again and navigate to the USB drive. You will see there would be a lot of files now shown, including the mach_kernel. Keep it there. Now we're going to install the iAtkos boot loader. Open the ML2_Bootloader_Installer.zip and place the .pkg onto your desktop. Run that .pkg and follow the instructions. MAKE SURE that it installs to your USB drive and NOT your hard drive / VM hard drive. There will be a "Change install location" button you can select. Once that is done go back to your USB drive and make sure the amd_kernel is still there. That kernel is the thing thats gonna get you booting. Installation Now we can do the more exciting stuff. Reboot and go into your BIOS. I am not sure how your BIOS settings look but mine went as follows: First went to Chipset -> Southbridge Configuration -> SATA Mode -> AHCI Then went to Boot -> Hard Drives -> Made the USB the first item in the list. Then went back to Boot -> Boot Devices -> Made sure USB was the first item in the list. Now you can save all changes and exit. Your machine will reboot. Once you have booted up you should on the iAtkos bootloader screen. If you are, good, everything has seemed to go well this far. If not, comment with what happened exactly. Okay now select your USB drive, it should be called "Install", by moving the arrow keys. Now type in these flags: amd_kernel -v USBLegacyOff=Yes The USBLegacyOff=Yes may not apply to you but its what got me booting. When I didn't use it, I couldn't get to the PCI Configuration part of boot. Now if all is well LOTS of text will start scrolling down your screen. If it hasn't worked for some reason comment again with the line that it stops at. If you get "Not found" right at the top of the screen, it means you either didn't place the amd_kernel into your ROOT of the USB or you typed the name in wrong. Okay so if all has gone well you will be greeted with the installer. Have patience, the scrolling text does take quite a while. Now once you're in the installer at the top bar click Utilities -> Disk Utility Select your hard drive that you want to install Mac onto. REMEMBER select the hard drive that does NOT have windows on. Either it will say "Windows" as one of the partitions or you will know it by the ID. Click the hard drive, and then go over to the Partition tab. Partition it, ensuring that Journaled (Extended) is selected. Call the drive MAC. The format shouldn't take too long. Close the Disk Utility and continue with the installer. Select the MAC partition you just created when prompted. Now I didn't customize my installation, but if you want to, you can. If not, hit continue and allow the installer to install the OS. This took around 45 minutes for me. If the screen goes white and unresponsive, don't worry, just press space on the keyboard or any button and it should come back. At the end it will give an error about not being able to restart. Don't worry. DON'T REBOOT YET. We need to copy the amd_kernel to our main hard drive. Click Utilities at the top and click Terminal. Type the following in: cp /amd_kernel /Volumes/Mac That should complete with no errors. *Mac was the name of my partition, if yours is different, change it. You can now reboot. The first boot Now two things may happen (my setup was very weird, so I got lots of different errors / situations). Either, the bootloader will automatically find your drive and a countdown bar will show. Don't allow it to complete, press the "-" button to enter options. The other situation is the same as when we started, you will be able to select whatever drive you want. Scroll using the keyboard keys to the MAC drive. It should have an Apple logo on it. Type in the following flags to boot into it: amd_kernel -v USBLegacyOff=Yes These flags are the exact same as what were needed to get into the installer. So if you used other flags, add them too. It should now boot fine. If not, comment what panic you get or where it hangs. If all is well you would have been greeted by the Apple first boot setup screen. Congratulations, your MAC is now running and is working! Follow the instructions and boot into your machine. Now we're going to make our boots seamless so we don't need to worry about flags each time. Open finder, go into MAC and then go to /Extra. Inside there is a file called "org.chameleon.Boot.plist". Copy it to your desktop by dragging it there. Open it up and edit the line under "Kenel". It should be: <string>mach_kernel</string> Change it to: <string>amd_kernel</string> Close it and copy it back to the folder where the original org.chameleon.Boot.plist was. It will ask for authentication, then replace, then enter your password. We're almost done. Hang in there. In the finder, search for "Champlist" Run it. Under the Boot tab select USBLegacyOff=Yes. Don't touch anything else. Apply that and close it. You can now restart. Before you restart make sure your USB drive is disconnected. Go back into the BIOS and change the boot order so that your MAC hard drive is first. This is where remembering the hardware name of the HDD comes in handy. If you don't know you're gonna just have to test which one works, or go into Windows (remember to put SATA mode back to IDE) and find out. Now if all is fine you should boot fine. You won't have to type in anything. If you get any hangs / kernel panics post them here. Once booted, you will have an additional setup. It is just for keyboard layout. Follow it. Congratulations again, your MAC is now properly setup to boot seamlessly. Now you're probably wondering "Great but how the hell do I access my Windows". Easy! Fixing boot with Windows Reboot. Go into BIOS change SATA mode to IDE and make the Windows HDD the primary boot device. Boot into windows. Run REGEDIT. Go to: HKEY Local Machine -> System -> Current Control Set -> Services -> msahci. Click that folder. Edit the "Start" options. Change VALUE DATA to 0. It should be 3. Close registry editor. Once this is done reboot. Go into your BIOS and change the mode back to AHCI. Don't change the boot order. Boot back into windows. It will install devices. Once they are installed you can reboot. Your Windows is now AHCI compatible. Allowing the option to select which OS to boot Now once we're back in Windows download and run EasyBCD. Click add new entry. Click the Mac tab and enter the details. Call it whatever you want. It can even be Kittens. Click the Add Entry Button. You can change the default OS to boot from (one that is initially selected and booted if timer hits 0) to either Windows or Mac OS. Just go to the Edit Boot Menu tab and select the option. Easy. Now we can reboot again. You should be greeted with a post screen allowing you to select either Mac or Windows. If all is okay you can boot either one seamlessly. If you have any problems on your Mac, such as devices not working, I am not sure if I can help. Comment and I can try help. Incase audio does not work OOB (out of the box) Download this: http://www.osx86.net/view/2746-voodoohda_2.8.2_pkg_installer.html Unzip it inside your Mac OS and run the PKG. It should install fine. Once it is done we must also add an option to the User accounts for VoodooHDA to work properly. To do this, go into System Preferences -> User Accounts -> "YOUR NAME" -> And click the Login tab. Click the little plus on the left hand side. Go to applications and scroll to the bottom and add VoodooHDA. Apply and close. Reboot. Once rebooted you should be able to get sound. If not, in finder search "midi" and run Audio Midi. Make sure the settings there are correct. Well done! We are now done. You now have a successful install of Mountain Lion 10.8.2 and Windows 7, that can both be booted easily. I will keep updating this guide if I find any useful kexts. Enjoy!