I've an XPS 2720 All-In-One computer and successfully installed macOS Sierra 10.12.6 with Clover. Fully native graphics support on 2560x1440 built-in 27" screen. Touchscreen works too. Fully working Ethernet, WiFi, Bluetooth, Audio (patched AppleHDA), Internal Web Cam. Kexts used:
CoreDisplayFixup.kext
IntelGrpahicsFixup.kext
FakePCIID_HD4600_HD4400.kext
FakePCIID.kext
Lilu.kext
LiluFriend.kext
RealtekRTL8111.kext
Kexts_XPS2720_SIERRA_10_12_6.zip
IntelGraphicsFixup_1.2.1.kext.zip
Config.plist:
IntelGFX 0x04128086
ig-platform-id 0x0D220003
config.plist.zip Ask me if you have questions.