Maybe this will go through.
Narrowing things down. I can post a photo to Known from my desktop with OS X.
I don’t expect it to show up on micro.blog because that gets a feed of selected categories only, and Photos isn’t one of them.
How about an image in a post?
Test post of photo from OS X
Classy
Amazing work from @chrisaldrich explaining how and why he's gone about bringing his blogroll into the 21st century. I'm honoured to be on the list, with just one comment: the Vaviblog site, while still live, will not be updated, until it reverts to its original purpose. I have not yet found a way to import all the data from that instance of Known to my current instance, as I would like, so for now that site is a relic of my first steps onto the IndieWeb.
Blast. I can’t seem to upload images to micro.blog or to WithKnown. I’ll have to work on that tomorrow.
That's a real pity. And these things are so hard to troubleshoot. I can't help with that, but I can send replies.