This timer issue, is it really a major annoyance, rendering the system unusable, or you guys can live with it for a while until a fix comes up? Again, try with Clover UEFI.
The timer issue makes audio play super fast (I'm testing with USB audio) and prevents you from typing in a shell (keystrokes repeat like crazy). It also causes all mouse clicks to act as hold-clicks making it impossible to double-click. I'm getting around most of it by using SSH and clever keyboard shortcuts. Will try Clover UEFI shortly.
EDIT: A few discoveries:
-Loading AppleIntelE1000E.kext causes a hang and will prevent booting if you put it in /Extra/Extensions
-Cannot load legacy AppleHDA.kext - gives a bunch of symbol errors
-Still require -f to boot even after running kext utility. Is there a special 10.9 command for rebuilding caches?
-Cannot load VoodooHDA - outputs something like can't open PCI device to the kernel logs
-Clover UEFI can boot mach_kernel with the aptio fix drv. Working on kexts and smbios now to see if I can actually get it to boot into the OS. So far either hangs or looks like it is working and right after the kernel prints [ PCI Configuration Begin ] it reboots