I successfully installed OS X Mavericks 10.9 on my Acer 4820T laptop.
I used myHack to create the usb installer.
Click NO when myHack asks if you are installing on a MBR hard drive.
After myHack finishes, run this command in Terminal from the S/L/E folder on the usb installer: rm -rf AppleIntelHD*.*
Download the "MBR Fix" and put those 2 files on the usb installer in the correct folders.
After installation, boot off the usb installer but select your newly installed Mavericks Operating System. You should always boot with the flag -v
(verbose) so you can see all errors