Why bother to emulate an old Mac?
Legally you need to own the ROMS which usually means buying the old Mac;so just use the Mac!
I really don't get going to all the trouble of obtaining files,emplant boards etc .
One computer, many OS's. You can use Amiga and MacOS at the same time without having two computers on your desk.
Older iMacs are available on eBay cheaply and very cheap around university campus-I have a G3 blue/white tower ($20) and iMac($40) .The iMac still had the OS9 on it.
Grab the rom and dispose Mac.