To clarify, the build for older Macs is temporary: only for use in-house for testing and preparing website pages. We first started the project on Qt 5.15 and will use that if possible.
The shipping OS is easier: built with the latest Qt, and running on whichever OS versions it supports. Casey McD On Fri, Aug 14, 2026 at 8:45 AM Volker Hilsheimer <[email protected]> wrote: > On 14 Aug 2026, at 03:46, TurtleSoft Support via Interest < > [email protected]> wrote: > > Our project is almost ready to ship, built with the newest Qt version. > > However, we want to build a version for OS 10.14 Mojave. That way we can > run it on the same machine as our prior 32-bit app for final testing. In > fact, a build for OS 10.12 Sierra would be ideal (last OS that doesn't > require monthly fee for DreamWeaver). > > Is there information somewhere about the best combination of Qt, Qt > Creator and Xcode for each OS? We've tried installing several versions > from the archives, but it won't build because of missing kits. > > Thanks, > Casey McDermott > > > > Hi Casey, > > > The last version of Qt to still support macOS 10.14 as the target was Qt > 6.4: > > https://doc.qt.io/archives/qt-6.4/supported-platforms.html > > macOS 10.14 reached official end of life in October 2021. > > Qt 6.5 already requires at least macOS 11 as the target platform. Qt 6.5 > was an LTS release, but is at this point under extended security > maintenance, which requires a separate agreement: > > https://www.qt.io/development/qt-framework/security-maintenance > > If you built your application with the newest Qt (6.11), then the target > platform needs to be macOS 13 or higher: > > https://doc.qt.io/qt-6/supported-platforms.html > > The oldest commercially supported version of Qt is 6.8, and requires macOS > 12 or higher. > > > > I’m not aware of a comprehensive overview of which Qt version to use in > order to target which platform version. But asking google "what is the > latest Qt version that supported macOS 10.14 as target platform” provides > Qt 6.4 as the correct answer. > > Volker > > >
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