The next step assumes you have a Windows Installation iso. If not, go here. The link defaults to Windows 10, but you can select the other options in the drop down at the top of the page. Keep in mind, as of now, Windows 11 is not supported on machines without security features enabled and Boot Camp will immediately refuse to install Windows 11 if you try. It may be possible to upgrade to Windows 11 once the entire quadruple-booting process is completed, but testing will need to be conducted before recommending going that route.
Step 2: Install Windows 10 via Boot Camp
- Log into admin level account and open the Boot
Camp app
- Ignore “Secure Boot is not enabled” warning and hit “OK”
- Select your Windows iso (best stored on internal drive) file from dropdown menu
- Reposition size of macOS / Windows (half is generally the best option)
- Click “Install” (be sure battery can hold a charge and is over 50% or plug it in)
- Process will reboot automatically into the Windows installation menu
- If you have a product key, put it in, but…
- …you can bypass this, choose version of Windows to install, then purchase a key later
- Obligatory Licensing Agreement…
- Start the install; it’s surprisingly fast!
- Windows will reboot automatically a few times
- Go thru setup steps and create admin-level account with outlook.com ID – no way around this…sorry
- Once Windows installation is finished and you’re
at the desktop, Boot Camp support installation will popup automatically; start
process
- Another obligatory License Agreement…
- Once logged back in, update Apple Software
first, restart again
- There will be two small updates and then two big updates to Boot Camp
- Once logged back in, update Windows as much as
possible
- This could take a while, but important that all drivers are installed
- Don’t restart while updates are still downloading or installing – be patient.
Optional Step B: Adjust size of Windows Partition
If, while installing Linux in Step 4, you are unable to adjust the size of the Windows partition, stop that process and come back here.
- Go into Windows’ Disk Partitioner app
- Resize Windows to your desired size and leave the remainder unformatted
- Go back to Step 4; you won’t need to resize Windows; just install Linux
Now, there is a hidden partition at the start of the hard drive named “EFI.” This is where the boot files for all “Guid Partition Table” or “GPT-based” operating systems are store. After installation, Windows will take over the EFI partition, bypassing rEFInd, and only allow Windows to boot, but the steps to resolve this are as follows…