<div dir="ltr"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Craig I know I’m naive but QT do say<br>
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Target Platform Architecture Build Environment<br>
macOS 10.13, 10.14, 10.15 x86_64 and x86_64h Xcode 11 (10.15 SDK)<br>
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Build Environment<br>
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The build environment on macOS is defined entirely by the Xcode version used to build your application. Xcode contains <br>
both a toolchain (compiler, linker, and other tools), and a macOS platform-SDK (headers and libraries). Together these<br>
define how your application is built.<br>
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Note: The version of macOS that you are running Xcode on does not matter. As long as Apple ships a given Xcode version<br>
that runs on your operating system, the build environment will be defined by that Xcode version.<br>
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ahh I see apple’s fine print<br>
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Xcode 11 requires a Mac running macOS Mojave 10.14.4 or later.<br>
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James</blockquote><div><br></div><div>That's a bummer, Catalina shipped with Xcode 11 and I don't believe it's compatible with Xcode 10.</div><div><br></div><div>....you could always go the VM route if you can get your hands on a Mojave install. </div></div></div>