Install Snow Leopard 10.6.8 on Lenovo G770 i5 Sandy Bridge HD3000 laptop.
I’ve tried all different ways of dual booting with windows 7 premium 64 on this laptop and Mac OS X 10.6.8 but I always get the “chain booting error”. The only way I can dual boot to the Mac OS X is to use the USB flash drive loaded with Chimera 1.5.3 (although 10.5.4 just came out, but it does have some bugs IMO). Anyhow, I can load lion dp4 with full QE/CI/CL and native resolution 1600×900 without modifying anything. If I use retail lion.app, QE/CI disappear unless I use the intel HD graphics kexts from the lion DP4 and it’s not very stable and the atheros wifi and ethernet don’t work well.
Lion is nice and new, but the best is to load both of these OS X to an external USB drive and play with them. This tutorial is for dual booting windows 7 premium 64 (came with the laptop) and Mac OS X 10.6.8 with the mean of booting from a USB chimera 1.5.3 boot loader. I’ve been trialed and errored many times and here is the sure way to get your laptop working with these 2 operating system. Things need to be prepared:
iboot-legacy, multibeast 3.8, chimera boot loader 1.5.3, UpdateHelper (for updating 10.6.8 from 10.6.3 without kernel panic) , snow leopard 10.6.3 retail DVD, update combo 10.6.8, external usb drive 250GB (4 partitions), 1 usb flash drive (small in size 256MB will do for chimera boot loader to boot to OS X) , my extra folder with dsdt.aml (this one has the display slider backlighting), if you plan to install lion, get myhack to make the lioninstaller, try to get Lion DP4, if not buy the retail and download hd kexts from DP4 (will be on the lion tutorial).
Let’s get started
We need to back up our hard drive IMAGE, not files so we can restore in case something goes wrong using windows 7 back up tools. Make sure you select the boot sector also. Also make a window repair cd.
Burn iboot-legacy to a cd (no need dvd), download all the files above to a usb flash or put them all on the FAT DATA partition of the external USB hard drive we’re using to load SL10.6.3 retail dvd.
With external usb drive plugged in and iboot-legacy cd in dvd drive, reboot the laptop and hit F12 to select first boot device which is the DVD where iboot-legacy cd is in. Or we can hit F2 to access bios setting and change the dvd as the first boot device by default, choose the one that’s more convenient to you.
Now we need to eject the iboot-legacy cd and put in the Snow Leopard 10.6.3 DVD. Wait for about 5 seconds then hit F5 to refresh the boot menu, the OS X Installation DVD should come up. Move the cursor select the DVD icon then hit enter.
If the iboot-legacy is correct, you should be in the installation screen in less than 2 minutes, in there, we need to access diskutilities to partition GUID 4 partitions, 1 for 10.6.8, 1 for lion, 1 for lion installation, 1 for DATA using FAT format.
When done, close disk utility then select the correct partition to install, I would name them usb1068, lion, lioninstaller, DATA for identifications.
It should take about 20-30 minutes to install, and watch for the reboot, because we need to switch the OS X DVD with iboot-legacy again, the best way is to hit F12 (after restart) to get to bios then replace the CD.