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First, this post is in no way taking away from Darvinko's post here. That thread did an amazing job figuring out how to get ML on the E6400. This is merely my way of installing ML on the E6400 in just 5 steps. It's quick and easy with no manual copying/overwriting of files. This was tested on an E6400 and M4400 (both with nVidia graphics) but will most likely work on the E6500. These instructions assume you know the basics of using myHack and the OSX installation process. Credits go to Darvinko, Tengokuu, Patel4Prez, CypressPearl, Conti (myHack), Mariusz and any others I've forgotten. Prerequisites: Mountain Lion, myHack, 8GB USB stick, access to an existing OSX install (to prepare files), and patience 1. Extract attached Extra.zip file, which is both the bootpack and Extra folder. 2. Use myHack to create the USB installer. 3. Run myHack again and choose "Install Extra". Point to the USB drive as the destination, and choose "use my own" and point to the folder that you extracted in step 1. 4. Boot from USB and install Mountain Lion 5. Near the end of the installation, myHack will ask for the Extras folder. Again, choose "use my own" and point to the Extra folder on the USB installer. Sleep should work natively with the included DSDT.aml file (posted by Mariusz), but must set hibernatemode to 0 in terminal: sudo pmset -a hibernatemode 0 If sleep still doesn't work, then you can try SleepEnabler. I didn't include the IO80211Family.kext because my wireless card worked with the DSDT out of the box, but if your wireless doesn't work then you can install the modified IO80211Family.kext in the other thread. KNOWN ISSUES: 1. Power Management - Fans constantly on and CPU runs hotter than usual. Some users have reported partial power management using NullCPUPowerManagement.kext 2. Shutdown/Restart may work sometimes, but other times it could either stall or kick you back to the login screen. Only way to shutdown is to hold power button. 3. Sleep/Wake - Some users report that sleep doesn't work (especially if using NullCPUPowerManagement.kext). Some report that sleep works but can't wake screen back up. A few report success using SleepEnabler. I've had luck with Sleep working with just the DSDT. INSTRUCTIONS FOR UPDATING TO 10.8.3 from 10.8.2: NOTE: you may not need these files as others such as Darvinko were able to update successfully. But it doesn't hurt to update the nVidia kexts... better safe than sorry. 1. Download the Combo update and the NVIDIA.zip below 2. Extract the contents of NVIDIA.zip to /Extra/Extensions/, overwriting the previous files 3. Install the Combo update, but DO NOT REBOOT when it finishes 4. Run myHack -> myFix (choose full fix) 5. Reboot and pray EDIT (9/20/2012): updated Extra.zip with new edited nVidia kexts for 10.8.2. EDIT (3/13/2013): removed VooodooPowerMini.kext from Extra.zip EDIT (3/15/2013): updated Extra.zip with new edited nVidia kexts for 10.8.3; added NVIDIA.zip as a separate package for those that are updating to 10.8.3 from 10.8.2. Extra.zip NVIDIA.zip