(but if I'm wrong, please correct)
This laptops has emulation Legacy Boot, so the Chameleon boot loader can't load the GPT partition disk(BIOS don't see mbr boot sector if detect GPT disk).
Legacy boot can only MBR start, but then need get patch for install osx on mbr-partition... brrrr
and with edp doc pre-install you don't get setup OSX on ativ 7 np740U/730U.
While successfully got it done with Clover UEFI boot loader(smbMacbookAir5,2) + kexts (EFI/clover/kext/10.x) :: FakeSMC, GenericUSBXHCI, ApplePS2ElanTouchpad(v3.x).
Anybody solved the problem(blackscreen) of the internal !eDP! screen after changing resolution or connection HDMI?