Can't install Lettera beta on macOS 15

[mrdavefoy]

• Lettera Version: 1.0.0 build 3980
• macOS Version: 15.7.4
• What were you doing: trying to install the beta in TestFlight
• What happened: I can’t install it because TestFlight says macOS 26.0 or later is required
• What did you expect to happen: the TestFlight page says macOS 13 or later is required

I ideally don’t want to upgrade to macOS 26 yet for various reasons (awful UI, incompatibility with some important apps). Does the TestFlight page above need updating?

[trix180]

Lettera is available for macOS 26 (or 27 beta). More info here:

Support Sequoia

I completely understand the frustration, and I’m sorry the 26+ requirement is a blocker for some of you. The short version: Lettera is built around the new macOS design language, and supporting older versions would have meant a lot of extra work for relatively little return. We’d rather put that effort into making the app great on the platform it targets than spread ourselves thin maintaining compatibility layers for older systems. It’s not a decision we took lightly, and I know it’s not the a…

[mrdavefoy]

Ah! So this line on the TestFlight page relates to the TestFlight app, not Lettera.

macOS apps: Mac running macOS 13 or later.

Got it. Thanks