I’m supposed to be able to lend ebooks from my local library. Adobe makes it impossible as their software doesn’t run on my macbook…

Adobe Digital Editions runs on my MacBook Air M3 with macOS Tahoe. What problem do you see?

(FWIW, ADE will probably die when Rosetta support goes away with MacOS 28, but one of the de-DRM plugins will read acsm files directly and bring in the books.)