Mount the Mac OS X Lion installation file. When the erase process is complete, close the Disk Utility window. Select Mac OS Extended (Journaled) from the Format drop-down menu. Select your USB flash drive from the list of drives that appears on the left side of the Disk Utility window. Launch the Disk Utility application, which is located in the Utilities folder. Connect your USB flash drive to your Mac. Here’s what you’ll need to create a bootable Mac OS X Lion USB drive: A USB flash drive that is at least 8GB in size A copy of the Mac OS X Lion installation file Once you have everything you need, follow these steps to create your bootable Mac OS X Lion USB drive: 1. This will allow you to install Lion on any Mac that supports the use of bootable USB drives. If you’re interested in running Lion on your Mac, you can do so by creating a bootable USB flash drive. Just open Disk Management (Administrative Tools), remove the 5 GB partition and create a new one using all the drive.Apple’s latest operating system, Mac OS X Lion, was released on July 20, 2011. When you format the USB drive as FAT/NTFS you'll notice its size was reduced. If you use PS/2 keyboard or a laptop you will need VoodooPS2Controller.kext (or ApplePS2Controller.kext) and AppleACPIPS2Nub.kext While you don't have power management fixed, you will probably need NullCPUPowerManagement.kext Install essential and other kexts you may need (network, audio, etc). Boot the USB drive, then choose to boot the HD you just installed OS X (not the installer USB again). Wait for the installation to finish and restart.

If you want to install the boot loader in this partition and you use MBR (not GUID, like if you already have Windows in the HD), it must be a primary (not extended/logical) partition. You need at least one free partition, use Disk Utility (in the Utilities menu) to erase it as Mac Os Extended (Journaled). Mv AppleIntelHD* AppleIntelSNB* AppleIntelFramebuffer* AMDRadeon* ATI* GeForce* NVDA* /kext_backup You can also move kexts booting in single user mode (press space bar in Clover or down arrow key in Chameleon)

Intel = AppleIntelHD*, AppleIntelSNB* and AppleIntelFramebuffer* If boot stops right before reaching the installer, or graphics aren't working right, delete video kexts:

If you need, use TransMac to delete kexts which are causing problems (System/Library/Extensions) and delete kernelcache (System/Library/Caches//Startup) For other BIOS use legacy boot to install, you can fix UEFI boot later If you want to use Chameleon press 1 at boot If the problem persists, disable your anti-virus software, it may be blocking raw write to the drive. When Windows asks if you want to format it, cancel and run Image Writer again. If you have error during copy, eject and re-connect the pen drive. Access chat to get download link (channel topic).

Mac os lion bootable usb from windows