Throughout 2012 mannequin yr, Apple began transport iMacs with out Optical drives. Additionally, Apple began transitioning to (U)EFI booting of Home windows. Nonetheless, your Mac was designed to legacy BIOS boot all Home windows installations.
Be aware: This methodology of set up might require short-term use of a wired keyboard and/or wired mouse.
Use macOS Catalina to create a Home windows 10 set up flash drive.
To check this reply, the Home windows 10 iso file Win10_22H2_English_x64v1.iso was downloaded from this Microsoft web site. For a Late 2012 iMac, the Home windows 10 set up disk could be created by the Boot Camp Assistant. Under is a snapshot of contents of this flash drive.
Create a partition for the second Home windows set up.
When testing, the Disk Utility utility included with Catalina (macOS 10.15.7) had an inclination to fail, when making an attempt to shrink the Apple_APFS partition and add a brand new ExFAT formatted Microsoft Primary Knowledge partition. Subsequently, this reply recommends utilizing the diskutil command to perform this activity. For instance, to shrink a 499.0 GB Apple_APFS partition to roughly 300 GB and make a brand new Home windows named partition of about 199 GB, the next command would have to be entered.
diskutil apfs resizecontainer disk0s2 300G exfat Home windows 0
Be aware: This command will go away disk0 hybrid partitioned.
Make Home windows the default in addition and boot to Home windows.
This may be executed by both of two methods given under.
- From the Startup Disk pane of the System Preferences utility.
- By holding down the management key whereas choosing
Home windowsfrom the Mac Startup Supervisor.
BIOS boot from the flash drive.
Restart the Mac, then maintain down the possibility key till the Mac Startup Supervisor icons seem. Boot from the flash drive by choosing the exterior (or flash) drive icon labeled Home windows.
Set up Home windows 10.
Proceed with the set up till a show much like the one proven under seems.
- Choose the partition named
Drive 0 Partition 3: Home windows. - Format the partition. The Home windows label will probably be eliminated. The show ought to now seem much like the one proven under.
- Procced with the set up of Home windows to this partition.