I'm also particularly interested for gridseed users to give the bfgminer included a shot as this is the latest from github.
I have two Gridseed 5-chip units, currently mining with minerd via Terminal, one device per minerd. I am willing to try 1.5.20b1 but would like some setting information. Also do I need to have two instances of MacMiner, one per Gridseed unit?
Unfortunately using the CPU miner window which uses minerd you do have to have two instances but I'm hoping you'll now be able to use the devices in one instance of the GPU window with manual flags either
-S gridseed:all
or
-S dualminer:all
i :: think :: the latter is for 1 chip and vice versa but not totally sure.
Good: "-S gridseed:all" works for me, finds and mines with both Gridseed devices.
Bad: Neither of my BTC miners work, back to 1.5.18e.