On Virtualbox click 'New' Choose OS as Mac OS X and click on 64bit or 32 bit (depending on your system) Snow Leopard. Use this guide to convert the Lion dmg into an iso. My suggestion is: Acquire a Snow Leopard iso image. The boot to installer is extremely long (1 hr total time). I know this works with Snow Leopard, but I'm not sure about booting Lion in Virtualbox. If the Catalina is working, all we need is to update those above and make sure to get the new Lilu.kext (14.9), WhateverGreen.kext (14.4), AppleALC.kext (15.4) and everything should work.

For error “waiting for root device”, make sure to have USBInjectAll.kext installed. The DW1820a must have an argument on boot brcmfx-driver=2 for the WiFi to work. The SMCBatteryManager.kext no longer works, need to use ACPIBatteryManager.kext from Rehabman for the battery to display. I also need to install CtlnaAHCIPort.kext to be able to see the SATA internal hard drive. To use OpenCore to boot, we need 0.6.3+ version, I did use 0.6.4 to be able to boot into the flash drive. This OS did change quite a few things that will not work with the older Catalina setup. This post will show how I installed on my Windows Laptops and Desktops.

The macOS Big Sur 11.2.1 is officially released for download and upgrade.

How to install mac os on pc without mac