Optional: New USB mapping

This is a superior USB mapping and is recommended for most people using the Z170A Gaming M3.

It maps all USB ports on the motherboard's rear ports, maps the motherboard's USB3 'case' ports, and maps the motherboard's USB2 'case' (internal) ports (for use with a PCIe-based wifi/BT card, so that the BT works; you have to attach a USB2 header from the wifi/BT card to the motherboard's USB2 header). This labels that port as type:internal.

Replace the existing KEXT in EFI\oc\kexts with this one. No other changes are required.

OC88 : Basic EFI for MSI Z170A Gaming M3 : R1.0

Release 1.0. Basic EFI for Z170A Gaming M3 from MSI, with OpenCore .88. Put it on a USB stick in the EPS (EFI) partition, with a one folder in root called EFI and two subdirectories (OC & Boot) in there. Modify to suit. Add SMBIOS Serials when appropriate.