Radius QuickColor - an ARM for your Mac II

From 1989, an appearance of ARM in a third party product:

RISC processor: VL86C010 Acorn RISC Machine
Processor clock speed: 10 MHz
Average processor MIPS: 6 MIPS processor
Static RAM: 64 Kbytes;

The brochure says there’s a multi-tasking RISC operating system in there, but I rather expect the user has no way to run any ARM code: it’s very much about accelerating QuickDraw.