On Thu, 19 Oct 2023 11:00:42 +1100
Jonathan Gray <j...@openbsd.org> wrote:

> Are there multiple models of iMac11,2 or is this due to something
> not acting as linux does?

Yes, iMac11,2 (21.5-inch, Mid 2010) has 3 models in everymac.com,
 - Core i3 3.06 GHz, Radeon HD 4670, 256M vram
 - Core i3 3.2  GHz, Radeon HD 5670, 512M vram
 - Core i5 3.6  GHz, Radeon HD 5670, 512M vram

These Radeons might differ.  Marcus's 3.06 has product id 0x9488,
which in drm/drm_pciids.h is CHIP_RV730.  An iMac11,2 3.2 in
OpenBSD's dmesg collection has id 0x68c0, which is CHIP_REDWOOD.

An iMac probably has its original graphics card.  A Mac tower can
swap cards; a PowerMac7,3 might have radeon or nvidia.


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