Right-click on mand and click "open", then "open" again. Now you will will use the MountEFI program downloaded earlier to mount the hidden EFI partition on the USB drive. They should be moved to this subfolder: EFI/ACPI/OC Once all of those files are downloaded, move them into your EFI folder. Here are the links for the SSDTs needed for my Coffee Lake system. Just select your processor type and download each of the required SSDTs. You can find the list of the exact SSDT's you need at this link. This is different depending on your processor. We will now make some modifications to the contents. Scroll down a bit and you will see a table with the SMBIOS to use.Īfter selecting the appropriate System Model, click the "Generate EFI" button at the bottom.Īn EFI folder has now been created on your desktop. Select the section on the left side for your processor type (in my case it is "Coffee Lake"). To figure out what System Model to use, go to the Open Core Install Guide. For my setup I used "iMac19,1" but it could be different for you if you are using a different processor of a different operating system version. The SMBIOS is important and you will have to specify the correct System Model on that tab. These are very commonly used options but there is a small chance your settings will be different depending on your hardware and specific use case. Under "Graphics" select "WhateverGreen" and under "Audio" select "AppleALC". The type of processor I used is "Coffee Lake".įor most of the tabs in this program you can keep the default settings. Look in your processor's documentation to determine the name of the microarchitecture it uses. On this first screen under "System Type" choose the type of processor you have. But this program simplifies things for us quite a bit and it is not available for Windows. You can also do this is a more manual method by following the OpenCore Install Guide. It will go out and get everything we need except the SSDTs and put them in a folder for you. This is a software wizard that helps us easily prepare what we need to install MacOS on our particular hardware setup. To open the program, you will have to right-click the icon, select "open", then select "open" again. After this is done, open the OC_Gen-X program you downloaded earlier. You'll have to wait a bit for this to install. If you are installing a different version of macOS, you can find the command for the version you are installing here. Sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume If you are installing macOS Big Sur, type the following command: You will use a command in the terminal to make the USB drive into a bootable installer for macOS. Then click the "Erase" button.Īfter the USB drive is prepared, open the Terminal in MacOS. Make sure the format is Mac OS Extended (Journaled) and that the scheme is GUID Partition Map. Once Disk Utility is open, make sure that the view is set to show all devices.Ĭlick the USB drive, then click "Erase" in the top menu. To get into Disk Utility, just click the magnifying glass and type "Disk Utility. Click "Get", and then "Download".įormat your USB drive using Disk Utility.
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