1. macOS Catalina 10.15.6 Olarila or App store copy.
2. you can use ( TINU app ) is easy way for App store Download from here : https://github.com/ITzTravelInTime/TINU
3.or use Olarila 10.15.6 from this web siet.
4. EFI Folder : EFI-DELL 3493 Ice Lake.zip
5. ACPI Folder : ACPI.zip
6. kexts you need From full EFI folder here : ( old link deleted ) go to Update section down.
7. I prepear set Boot to Apple normaly not -v.
8. Not work : wifi ( change to your choice ).
9. Nvidia ( Gforce MX 230 ) working now after some set + web driver.
10. ALC 236 layout=54 working now without ( VoodooHDA.kext ).
11.Trackpad not work use usb mouse.
12 SMBIOS : MacBookAir9,1( 2020 ) Ice Lake 10th prossesor.
13. if you have any problem with boot change SMBIOS kind to = iMac20,1 + SMBIOS = creat + change smbios Gaide to = false or no from kernel section by Opencore Configuration + after full instilation your Mac change it that choice to befor Smbios to first set.
14. To show full PCI in Computer components use DSDT.aml Olarila Cofee lake + with my original ACPI.
Have a nice try, Thank you.
A. ( NEW ) EFI Folder = All parts were manually inserted + Speed of performance with opencore (version 6.2) compaible with alot of dell ( 3593, 5XXX,7xxx, ... etc ) ice lake https://www.dropbox.com/s/ye7girdznc08a3b/EFI-DELL3493-OC-VERSION ( 6.2 ).zip?dl=0
Instrection Bios : https://www.dropbox.com/s/4ebkte63ldk9ndi/Bios setup for Dell 3493.pdf?dl=0
UPDATE ( 19 OCT 2020 )
OpenCore ( 6.2 ) + new chipset wifi ( Dual Band Wireless-AC 3165 Plus Bluetooth ) 100% working + NVRAM.plist + Nvidia ( Gforce MX 230 ) working now after some set + web driver & Intel Iris Plus Graphics G1 (Ice Lake) working + ALC 236 layout=54 working now without ( VoodooHDA.kext ) + boot voice for opencore.
New EFI ( 19 OCT 2020 ) https://www.dropbox.com/s/fclkraagvwqjyv6/EFI-DELL-3493.zip?dl=0
about intel wifi model compat+kext https://openintelwireless.github.io/