Apple says these Mac Pro graphics cards are Mojave compatible, reveals Boot Camp support l...
Apple on Monday updated a pair of support documents relating to the release of macOS Mojave, outlining legacy Mac Pro compatibility via graphics card upgrades and support for Boot Camp on certain iMac models.

A first document walks users through installing macOS Mojave on the Mid 2010 and Mid 2012 Mac Pros. As mentioned previously, these machines did not ship with GPUs that support Metal -- Apple's 3D graphics API -- and must be updated before upgrading to macOS Mojave.
Apple lists a series of GPUs that support Metal, and thereby macOS Mojave, for those looking to keep their aging workhorses up to date.
The following cards are known to be Metal-compatible:
A second support document helps resolve the "Installation cannot proceed with Boot Camp configured" alert that might show up on certain iMac models when attempting to install macOS Mojave.
This alert appears only on 27-inch iMacs from late 2012 with 3TB hard drives installed and an existing Boot Camp partition. To bypass the message, users must back up their Windows data, then remove the Boot Camp partition before installing Mojave.
Apple warns users that after they do perform the removal, they will no longer be able to use Boot Camp to install Windows on their machine.

A first document walks users through installing macOS Mojave on the Mid 2010 and Mid 2012 Mac Pros. As mentioned previously, these machines did not ship with GPUs that support Metal -- Apple's 3D graphics API -- and must be updated before upgrading to macOS Mojave.
Apple lists a series of GPUs that support Metal, and thereby macOS Mojave, for those looking to keep their aging workhorses up to date.
The following cards are known to be Metal-compatible:
- MSI Gaming Radeon RX 560 128-bit 4GB GDRR5
- SAPPHIRE Radeon PULSE RX 580 8GB GDDR5
- SAPPHIRE Radeon HD 7950 Mac Edition
- NVIDIA Quadro K5000 for Mac
- NVIDIA GeForce GTX 680 Mac Edition
- AMD Radeon RX 560
- AMD Radeon RX 570
- AMD Radeon RX 580
- AMD Radeon Pro WX 7100
- AMD Radeon RX Vega 56
- AMD Radeon RX Vega 64
- AMD Radeon Pro WX 9100
- AMD Radeon Frontier Edition
A second support document helps resolve the "Installation cannot proceed with Boot Camp configured" alert that might show up on certain iMac models when attempting to install macOS Mojave.
This alert appears only on 27-inch iMacs from late 2012 with 3TB hard drives installed and an existing Boot Camp partition. To bypass the message, users must back up their Windows data, then remove the Boot Camp partition before installing Mojave.
Apple warns users that after they do perform the removal, they will no longer be able to use Boot Camp to install Windows on their machine.
Comments
then remove the Windows partition.
Then install Mojave.
Then... nothing. You cannot restore your data. Good luck though.
That's... pretty bad.
I know of too many people who have Macs because they took a chance, but having Windows available to use was what won them over.
Not very Apple-like as far as non-solutions go.
I am pretty sure this only happen on 2012 27" iMac model with 3TB hard drive installed and an existing Boot Camp partition. Pretty specific, not even a minor cases. So not exactly as you claimed that it happened on most Macs. I am pretty sure none of the "many people you know who have Macs" have that particular model with that particular HDD. It could be that particular model hardware no longer supported it. You still can install windows with Parallel if required. note: 6 years old iMac has no business to install Mojave.
maybe so.
But I generally feel we shouldn’t hold everyone back just to make a few people feel better about themselves.
A model year iMac can be partially compatible, can’t it?