Beta1 installs in the exact same manner as High Sierra. The difference is that 10.14 requires Clover r4517 or higher to install successfully.
https://github.com/Dids/clover-builder/releases
So far, Ok on my Ivy Bridge/HD4000 Latitude E6230 with same EFI/bootpack as High Sierra 10.13 and Clover r4521. I made a quick and basic, not fully tuned, installation:
Apple stated that Mojave will only support GPUs compatible with Metal so HD3000 and older 1st gen Intel HD graphics are effectively dropped (and there are no kexts for these). Support for Intel iGPUs now starts at Ivy Bridge HD4000.
So, I won't be trying Mojave on my E6220 nor on my ancient D630 (support for nVidia Tesla architecture dropped too)... We'll see if this gets to evolve in the following beta versions but not much of a hope I guess.
APFS conversion seems to be mandatory too. Despite my modification of the minstallconfig.xml file of the 1st reboot temporary installation in which I had set the ConvertToAPFS parameter to false, my target Mojave partition ended up converted! Not a problem in itself on my SSD (and APFS is reportedly Ok on mechanical HDD now) but that means a definitive goodbye to Chameleon/Enoch for the time being. Inescapable eventuality I guess...
List of officially supported Mac models is as follows (as per /S/L/CoreServices/PlatformSupport.plist)
MacPro6,1
iMac17,1
iMac16,2
iMac16,1
iMac15,1
iMac14,4
iMac14,3
iMac14,2
iMac14,1
iMac13,3
iMac13,2
iMac13,1
Macmini7,1
Macmini6,1
Macmini6,2
MacBookPro12,1
MacBookPro11,5
MacBookPro11,4
MacBookPro11,3
MacBookPro11,2
MacBookPro11,1
MacBookPro10,2
MacBookPro10,1
MacBookPro9,2
MacBookPro9,1
MacBook9,1
MacBook8,1
MacBookAir7,2
MacBookAir7,1
MacBookAir6,2
MacBookAir6,1
MacBookAir5,2
MacBookAir5,1