Add native support for Apple Silicon

[Majirefy]

Since Tiled is now complied in QT 6, I believe it's good time to add native support for Apple Silicon.

Now Tiled is in x86 on macOS, shall we make it a universal app with native support both for x86(Intel) and Apple Silicon Macs?

[bjorn]

Yes, good idea! Is this something you can help with? Otherwise I'll have a look into it next week. I just don't have this hardware myself so I won't be able to test it.

[Majirefy]

Yes, good idea! Is this something you can help with? Otherwise I'll have a look into it next week. I just don't have this hardware myself so I won't be able to test it.

I have M1 Max MacBook Pro, but don't know how I can help with. Any instructions for me to follow? I will do my best!

[bjorn]

Here are the commands being used to compile Tiled for macOS:

tiled/.github/workflows/packages.yml

Lines 208 to 234 in 062145f

	- name: Install Qt
	run: |
	sudo ./dist/install-qt.sh --version ${QT_VERSION} qtbase qtdeclarative qtsvg qtimageformats qttools | tee -a $GITHUB_PATH
	sudo ./dist/install-qt.sh --version ${QTCREATOR_VERSION} qtcreator | tee -a $GITHUB_PATH
	- name: Setup Qbs
	run: |
	qbs setup-toolchains --detect
	qbs config defaultProfile xcode
	- name: Build Zstandard
	run: |
	git clone --depth 1 -b master https://github.com/facebook/zstd.git
	pushd zstd/lib
	make libzstd.a
	popd
	- name: Build Tiled
	run: |
	qbs install --install-root install config:release qbs.installPrefix:"" projects.Tiled.staticZstd:true
	- name: Deploy Qt
	run: |
	macdeployqt install/Tiled.app -verbose=2
	rm -f install/Tiled.app/Contents/PlugIns/tls/libqopensslbackend.dylib
	pushd install
	ruby ../dist/macos/fixup-install-names.rb

What would need to be added is something like:

• The Apple Silicon binary release of Qt would need to be installed as well. This may be done already, if the Qt binaries for macOS ship as universal in the first place. It seems like this is the case, if "ARM64" refers to Apple Silicon in the files at https://mirror.accum.se/mirror/qt.io/qtproject/online/qtsdkrepository/mac_x64/desktop/qt6_650/qt.qt6.650.clang_64/.
• Qbs would need to be somehow instructed to build a universal app. This page has some information about multiple architectures which might apply.

[iplanetcn]

Hope to support apple silicon as soon as possible.

[bjorn]

There is now a universal build available at https://github.com/mapeditor/tiled/actions/runs/5393521019 (the macOS 10.14+ artifact). It is not signed + notarized for now, but any testing would be really appreciated!

Edit: Now that the PR was merged, signed and notarized builds are also available at https://github.com/mapeditor/tiled/actions/runs/5398366246