Did Apple ever [...] support 8" drives?
There were a couple of aftermarket outfits that sold 8" drives,
controllers, and software for Apple II's. These were available through
Apple dealers but weren't really products of Apple Computer.
(Typically they were used for interchange with CP/M systems, although
I know of a few used to exchange RT-11 and UCSD stuff.)
The brands I remember are Vista and Lobo. I think Lobo had patches
for 8" drive access via Microsoft Softcard and CP/M.
Tim.