Clean installing OsX 10.10 on the SP1
(this is an extract from my guide on InsanelyMac, click here for the original)
Part 1:
creating the Usb Installer
Devices:
8gb Pen Drive
A Vm a Mac or another Hack
Files:
latest GenericUSBXHCI from here
latest Clover from here
Yosemite Installer (placed in the Application folder)
Things are really getting easier, this time we just need a couple of steps to create a bootable pen drive.
We need something with OS X already running on it to create the Usb installer, even a VM is ok.
Then after formatting the Pen drive with Disk utility and naming it "install" with the Yosemite installer inside the Application folder just open the terminal and paste this:
Quote
sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/Install --applicationpath /Applications/Install\ OS\ X\ Yosemite.app --nointeraction
when done, install the latest clover to the pen, choosing efi installation.
The Efi partition will automatically mount,
copy dsdt & ssdt files to efi:clover:acpi:patched
config.plist to efi:clover
and fakesmc and genericxhci to efi:clover:kexts:10.10
That's it for the first part. 
Part 2:
Install Yosemite
disconnect every device or screen
Even this is really simple,
with the Usb device we created on step1 inserted,
press and keep pressing volume down while pressing power, this will force the tablet to boot from usb
At the clover welcome screen go to options and add -x as boot argument then with the usb highlighted in Clover press space and choose kext injection.
When the installer boots use disk utility to plain format the whole drive using guid (under options) and mac os extended journalized.
Proceed the Installation like a real Mac.
Part 3:
First Run
SafeBoot with injection.
Again with the Pen inserted,
press and keep pressing volume down while pressing power, this will force the tablet to boot from usb
At the clover welcome screen go to options and add -x as boot argument then with the local drive highlighted in Clover press space and choose kext injection.
when booted, after the welcome screens, install clover to the local drive drive always choosing efi mode, then copy config.plist, dsdt and ssdt to local efi.
Use KextDrop to install all the kexts.
Install touchbase demo driver, or if you bought it install your copy.
Good to go...

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