Upgrading to 841's Help

[KamanCrypto]

HI ALL,
Need a little help here. I am upgrading my 741's to 841's but understand I have to update controller software too. This is where I need the help. I got all my other stuff ready to mine just needed to set up controller with network and pool details and away I went mining. Now that I have some 841's i need help to flash avalon controller (it is what I read) and then install new 841 firmware. (I'm guessing the miners all have the latest firmware update on them). I could please use a tutorial on how to flash sd and install appropriate firmware using a mac computer. Thanks in advance for any help provided.

[NotFuzzyWarm]

Well, a simple search of the Canaan.io website leads to the Avalon how-to...

Only change to those instructions for the 821/841 is to get the A841 RasPi image from here.