At the Chimera screen again, select your HDD/SSD icon and hit enter. It will give you a mach_kernel not found error and take you back to the Chimera screen.
Immediately select the UniBeast icon and hit enter. If it works the way it did for me it should boot to desktop. Before you do anything else, run BridgeHelper 5.0.
Run MultiBeast User DSDT/DSDT Free, select your audio and LAN kexts and install. Run Disk Utility and repair permissions. Eject UniBeast USB and remove it. Reboot.
Hmm. It takes so long to go through the install procedure I thought I'd try and shortcut. I got to the Terminal stage and deleted the mach_kernel on the HD (a 1TB drive) then rebooted to Chimera and selected the HD drive to boot.
Close.
This is weird, however: booting from the HD got to the desktop, which I did not think could happen without the mach_kernel, but the video was messed up. From the mess on the screen I was able to guess that it was a login screen, and I logged in with the pw I set for the default username. The screen was still messed up, but I was able to Cmd-Space which fires up Spotlight and then type in "BridgeHelper" to try and launch it. After that, I couldn't interpret the screen any more, or do anything useful, so I shut down.
So as an experiment, I rebooted using Unibeast, and ran through the installer process until I got to Terminal. This time, I copied the kernel from the USB stick to the HD:
cp /mach_kernel /Volumes/Lion/
Which did not throw an error, so I assumed it went well and rebooted again, this time to the HD.
However, when I rebooted into the HD partition, it got to the login screen again, but the video is still messed up. I can log in even though I can't see the login screen, but after that I can't do anything without the video working.
This feels like progress, but until I can get the video (the built-in HD4000 that the i7-3770k/Z77N provides) to work I don't know what to do next.
[Followup] - since my way was not what you recommended, I went back to your original post and tried your method:
UniBeast patched by Bridge Helper 4.0.1 on USB stick
Install to HD, remove HD from Hackintosh mount on Macbook
Remove mach_kernel from HD, replace with mach_kernel from USB in the Mac Finder with show invisibles turned on
Replace HD and USB in Hackintosh, reboot and select HD
[at this point I got a "not found" error so I quit trying]
So I don't really see a way forward. As far as I can see, Lion can't be installed on my hardware.
BUT!
That's not my goal: my goal is to get MOUNTAIN Lion installed.
So... It occurred to me I can't get MtnLion on my Mac because it's too old, but...
I started from scratch and redid the install again, to where I was able to boot to the HD BEFORE running MultiBeast, and instead used my Apple ID to buy a copy of Mountain Lion (very, very slow without optimised drivers). I then downloaded UniBeast for Mountain Lion (NOT rebooting) and used it to install MtnLion onto another USB drive. So now I have a USB Unibeast installer for MtnLion. I quit again and rebooted using it.
So now I can boot to the new installer and use it to install Mountain Lion on the 1 TB HD. (By the way, this is MUCH faster than the Lion USB - by a huge factor. The ML UniBeast boots to the install screen in a couple of minutes, not 45.).
Following the Tonymacx86 Mountain Lion install guide, I set the Z77N mobo defaults as per the thread there and did the install as said. This also goes much faster, less than 20 mins, not an hour.
Reboot the the UniBeast, select the new Mountain Lion install, and....
Spinning progress wheel. Nothing more. I left it overnight just in case this part was slow, but no.
So I used an SSD 120 GB and installed MtnLion to that instead.
Same result. UniBeast installs the OS really quickly btw. But it still won't boot. All I get is the Apple logo screen with the spinning progress indicator.
Now I'm baffled. I don't know where to go from here. I've tested the hardware by doing a Ubuntu install. Everything works (including WiFi) under Ubuntu. But I can't seem to get this to boot to Mac OS.
Any idea what I can try next?