build: Add support for x86 macOS 10.15 and ARM64 macOS 11.0 (#2607)

This PR drops the use of brew for dependency management in favor of
macports so we can support lower macOS versions instead of just the
lowest one supported by Apple

Closes #2586

dist/macOS/arm64.Dockerfile

@@ -1,7 +1,7 @@
 # This base image is also known as "crosscompile". See arm64.crosscompile.Dockerfile
-FROM ghcr.io/werwolv/macos-crosscompile:4c4af2d1a6a102fab93cc9cd660280c2ec9d72af as build
+FROM ghcr.io/werwolv/macos-crosscompile:6d89b20ac5ebedb6f680f94637591c94cb36f40b as build
 
-ENV MACOSX_DEPLOYMENT_TARGET 13.0
+ENV MACOSX_DEPLOYMENT_TARGET 11.0
 
 # -- DOWNLOADING STUFF
 
@@ -132,6 +132,7 @@ if [ "$CUSTOM_GLFW" ]; then
     mkdir build
     cd build
     CC=o64-clang CXX=o64-clang++ cmake -G "Ninja"       \
+          -DCMAKE_OSX_DEPLOYMENT_TARGET=11.0            \
           -DCMAKE_BUILD_TYPE=$BUILD_TYPE                \
           -DBUILD_SHARED_LIBS=ON                        \
           -DCMAKE_C_COMPILER_LAUNCHER=ccache            \
@@ -168,6 +169,7 @@ RUN --mount=type=cache,target=/cache --mount=type=cache,target=/mnt/ImHex/build/
         -DIMHEX_STRICT_WARNINGS=OFF \
         -DIMHEX_PATTERNS_PULL_MASTER=ON \
         -DCMAKE_INSTALL_PREFIX=/mnt/ImHex/build/install \
+        -DCMAKE_OSX_DEPLOYMENT_TARGET=11.0            \
         -B build
 ## Build ImHex
 RUN --mount=type=cache,target=/cache --mount=type=cache,target=/mnt/ImHex/build/_deps <<EOF

dist/macOS/osx_10_15/x64-osx.cmake

@@ -0,0 +1,11 @@
+set(VCPKG_TARGET_ARCHITECTURE x64)
+set(VCPKG_BUILD_TYPE release)
+set(VCPKG_CRT_LINKAGE dynamic)
+set(VCPKG_LIBRARY_LINKAGE static)
+
+set(VCPKG_CMAKE_SYSTEM_NAME Darwin)
+set(VCPKG_OSX_ARCHITECTURES x86_64)
+set(VCPKG_OSX_DEPLOYMENT_TARGET "10.15" CACHE STRING "" FORCE)
+set(VCPKG_C_FLAGS "-mmacosx-version-min=10.15")
+set(VCPKG_CXX_FLAGS "-mmacosx-version-min=10.15")
+set(ENV{MACOSX_DEPLOYMENT_TARGET} "10.15")