I'm experiencing this in the Mac application. Seems fine on the website though.

I have the same problem on Mac. All text in the popups are just question marks in square rectangles.

yep

Happens to me as well. Only the client application is affected. Started after updating to MacOS 26.

I'm having this same problem, too, with the Steam application on a MacBook Pro running Sequoia 15.7.1. Didn't notice this problem until after a long absence from Steam and updating to the latest Steam client.

Same problem here with Steam on Tahoe. I had used it fine a month ago before I updated, but now most, but not all, of the text is in the question-mark-in-box font. I tried uninstalling the app and re-installing it and that did not fix it.

I have this issue aswel!

I had the same problem on Tahoe, and I found a way to fix it: in my case it was a problem of duplicated fonts (even if it didn't seem to cause any problem before the Tahoe update...). Here is how to do it:
- Open Font Book on Mac, go to All Fonts, click on a font and select all the fonts with cmd+A.
- Go to File > Validate selection, then look at the fonts with a yellow <!> symbol; often it means these fonts are duplicated (there is one version in your user library, and one in the system library). In my case, a lot of system fonts like Arial and Verdana were duplicated. To check if it's the case, deploy the arrow next to the name of the font and you will see if the problem is Duplicate fonts.
- Click on Files > Resolve duplicates, then do File > "Validate selection" once again to see if it resolved the issue. Spoiler alert: in my case it didn't! Still the same number of yellow symbols.
-> So I had to go to my user library (click on Finder icon, in the top menu click on "Go", then hold Alt and you will see "Library" appear); in the user library, go to the « Fonts » folder, and normally you will be able to spot the duplicated fonts quite easily: in my case, all the duplicated fonts had a black icon "exec" and no extension. Delete these fonts (but be sure to double check that the fonts you delete are indeed duplicates!)
- Then I opened Steam again and the text displayed correctly.
I think that the Arial duplicates were the problem here but I ended up suppressing all duplicated fonts to make sure. I hope this was helpful and that it will work for you too!

good

I am seeing this also (on two different Macs), and removing the duplicated fonts in the user library solved it! Thanks! (Just in case, I stashed them in another folder rather than completely deleting them...)