If you use a Mac and want to upgrade the firmware of your Feker IK65 keyboard to get VIA support, this guide is for you. I will just list the high level steps to take. I will assume that the keyboard is connected over USB.
At the time of writing, you get it from [Epomaker's website][1]. If this link doesn't work, search for "feker" on their website. I noticed that the link to the firmware calls it an lk65 (lowercase L vs uppercase I), which explains why I found it so difficult to find this software on search engines.