Without it - running 2160p@1x results in very low quality text rendering on macOS.

Yeah that would work, that's just 2k HiDPI, not 4k HiDPI.

I tried quite a few things in the "Advanced" section of BetterDisplay - is there something specifically you're suggesting?

Parts of it were pasted from my Claude Code Logs, Parts were written by me - and the table - that was me!

Unfortunately BetterDisplay cannot set HiDPI @ 4K on the M5 machines - that was the first thing I tried.

Hey, thanks I hadn't tried screenresolution but that seems to simply set the resolution and refresh rate without controlling the scaling which is what is needed for configuring the HiDPI mode scaling.

I don't expect emails to get through to busy CEOs of huge companies like Apple unless you're really lucky and they make it through some automation, but I have dropped him an email just in case. I guess you never know.

He has an army of people that would read his emails. A truly important one should get read.

You could always try calling, too! I cold called Marc Benioff at Salesforce and he actually picked up the phone.

This needs a story. What did you say to him?

Heh, classic Mike (not the Pope one)

Helps if there are support case numbers with attempted diags, maybe.

Totally agree with those resolution suggestions. Personally I have a 32" 4k, I wanted a 5k or 6k back then (just too expensive) - but now I wish I had just got a 27" which is better suited to 4k - regardless it was a LOT better on the M2 Max with HiDPI working.

It's in the environment and test setup (26.4 at the moment, but it is the same across all 26.x releases I've tried).

I'm still on Sequoia and haven't noticed these issues on my M4 Pro.

Out of interest - whats the output of `system_profiler SPDisplaysDataType`?

Thanks for the feedback, I'll try to take some photos, it's not an easy thing to do accurately without a good camera setup, but I'll reply here after work if I get something setup and added to the post.