Clearly you can install 9.4.1 on Mojave...and it seems to work at least for trivial code, even compiling to 32 bit:
sh-3.2$ uname -a
Darwin bigapple-mojave.pri 18.0.0 Darwin Kernel Version 18.0.0: Wed Aug 22
20:13:40 PDT 2018; root:xnu-4903.201.2~1/RELEASE_X86_64 x86_64
sh-3.2$ xcode-select --print-path
/Applications/Xcode_9.4.1.app/Contents/Developer
sh-3.2$ cat hello.c
#include <stdio.h>
int
main(int argc, char **argv)
{
(void) printf("Hello, world!\n");
return (0);
}
sh-3.2$ gcc -m32 hello.c -o hello
sh-3.2$ file hello
hello: Mach-O executable i386
sh-3.2$ ./hello
Hello, world!
I have both installed, and simply switched the command line instances with
sudo xcode-select --switch /Applications/Xcode_9.4.1.app/Contents/Developer
I could switch back with
sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
The sample is a very undemanding C program. Not sure how well it would work
with C++, or Objective C, esp. if it was pushing the limits of what a 32-bit
executable was allowed to do on the prior OS release. And I hadn't been able
to figure out how to do a 32-bit build with the GUI, although since I rarely
use it, that could well be me, not it.
> On Sep 27, 2018, at 05:00, Ces VLC <cesarillo...@gmail.com> wrote:
>
>
> On Wed, Sep 19, 2018 at 7:54 PM Ryan Schmidt <ryandes...@macports.org
> <mailto:ryandes...@macports.org>> wrote:
> [...]
> > Mojave requires Xcode 10 which contains only the 10.14 SDK.
>
> Is it really required? Is it not possible to use Xcode 9.4.1 on Mojave? (I'm
> asking because I thought Xcode had a requirement for the minimum MacOS
> version it could run on, rather than the maximum MacOS version... obviously
> with the limit of course that you cannot use new features from SDKs newer
> than those provided with your Xcode version).
>
> César
>
>
>
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