Hello, I downloaded version 2025 r3 on my Mac with Mojave 10.14 it crashes and doesn’t even start. I use an older system because I have legacy systems that I can’t discontinue. Is anyone else having this kind of problem?
Version 2025 R2.1 Works fine !
Mojave is not supported anymore
I think the minimum version supported for 2025r3 is macOS 11. You can still use 2025r2.1 on older systems. The same is true for applications built with 2025r3.
The minimum macOS version to run the IDE is now Big Sur (macOS 11). If you need to build on Mojave, you will likely have to continue to use 2025 R2.1. System requirements — Xojo documentation
Edit: I guess the three of us started replying at the same time!
On Xojo website 10.14 os the minimum requirement !
Now I’m left wondering if this is an internal communication error or if it really doesn’t work in 10.14 ???
Xojo 2025r3 plist.info file still says:
<key>LSMinimumSystemVersion</key> <string>10.13.6</string>
Which is likely why it is reporting compatibility on 10.14.
I’ll wait for an official report from XOJO to see if it really doesn’t work or if it’s just a bug.
Tanks for your feedbacks
Xojo 2025r3 uses macOS SDK 26. According to Apple that version only supports macOS versions 11 to 26. The prior SDK version 16.4 supported macOS versions 10.13 to 15.
macOS SDK 26 was required to support macOS 26 Tahoe. That moved the minimum OS version from 10.13 to 11.
Wow, that makes two major OS versions skipped for one Xojo version. Seems huge to me.
So, with UI compatibility mode, 10.14 should logically still be supported 
.
The inner works of a framework goes beyond the UI, the rest isn’t compatible.
The next 2025 r3.1 must fix LSMinimumSystemVersion and Xojo the website info.
Blame Apple. 
