[smidley]

Goal

Run Project Midas natively on macOS (Apple Silicon and Intel) and ship a macOS zip next to the Windows and Linux ones. Closes #31.

This carries #42 forward. #42's branch is still on 1.0.1 and conflicts with current main, so I rebased its single commit onto 1.0.2b with sh4 kept as the commit author, fixed one 64-bit bug in code that landed in 1.0.2b, and added packaging. Credit for the 64-bit port goes to sh4 (#42). If sh4 would rather update #42, the two extra commits here apply on top of it once it's rebased onto 1.0.2b, and this PR can be closed.

Description

Three commits:

1. Add native 64-bit macOS support (sh4, from Add native 64-bit macOS support #42). Rebased onto 1.0.2b. Three conflicts, all resolved by keeping both sides:
   • src/game/bondview2.c: Add native 64-bit macOS support #42's WATCH_MODEL macros with 1.0.2b's bondviewWatchRate().
   • src/game/gunfire.c: 1.0.2b's portXhairPrecise() with Add native 64-bit macOS support #42's Gfx ** signature for portDrawTargetPlus.
   • tools/THIRD_PARTY_NOTICES.txt: both new sections.
2. Keep the sight's display-list pointer 64-bit (src/game/gunfire.c). 1.0.2b's HUD Scale brackets in gunDrawSight store the display-list pointer back with (s32). On the 64-bit build that truncates it, and right-click aiming crashed with SIGSEGV. sp54 is already intptr_t, so both lines now cast to intptr_t, like the wide-aim block above them. No change on the 32-bit builds.
3. Package a universal macOS release zip.
   • scripts/port/package_macos.sh builds releases/<name>/ProjectMidas-<name>-macos.zip with the linux zip's layout. SDL2 is bundled next to the executable, both are relinked to @executable_path and ad-hoc signed, and the README covers the quarantine flag.
   • The script refuses a build linked to Homebrew's sdl2. That package is sdl2-compat, which loads SDL3 at runtime, so it can't be shipped on its own.
   • New package-macos CI job: builds SDL2 2.30.11 from the pinned source (same SDL2_SRC_SHA1 as the Linux job), builds one universal arm64 + x86_64 binary for macOS 11+, packages it, and uploads the zip. Run on a tag, the zip gets the tag's name, e.g. ProjectMidas-v1.0.3-macos.zip.
   • docs/macos.md: short "Release zip" section.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Documentation update

How Has This Been Tested?

All on an M4 Pro, macOS 27.2, with a locally supplied US cart (SHA-1 matches).

• Native build and fixtures: clean Release build of the rebased branch; all 7 GE_PORT_TESTS fixtures pass.
• Pointer-width audit of the 1.0.2b changes: recompiled every translation unit with -Wpointer-to-int-cast -Wint-to-pointer-cast -Wvoid-pointer-to-int-cast -Wint-conversion -Wshorten-64-to-32 and kept the warnings on lines 1.0.2b added. The only hit was the (s32) agdl cast fixed in commit 2. I also searched those lines for (u32)(uintptr_t) double casts and raw (u8 *)p + 0x... struct offsets and found none.
• Aim crash, before and after: reproduced without a mouse using GE_SKIPINTRO=1 GE_STAGE=dam GE_NOINPUT=1 GE_INPUTPLAY=<file>, where the file holds R (P <tick> 10 0 0 for ticks 600-6000). Before the fix: SIGSEGV in portDisplayCrosshairImage from gunDrawSight on the first aiming frame. After: about 30 s in aim mode at 60 fps, no crash.
• Release zip: unzipped into an empty folder and ran it there. It loaded the bundled libSDL2-2.0.0.dylib (checked with lsof), found the cart in Data/ by itself, and ran Dam at 60 fps. Both binaries are universal and ad-hoc signed (codesign --verify --strict passes), with no rpaths into the build machine.
• In-game play on the rebased build: played it with the fix in; right-click aiming works.

Not tested:

• Intel runtime: the x86_64 slice compiles and links, but this Mac has no Rosetta. The CI matrix still builds and tests on macos-15-intel.
• Windows and Linux 32-bit builds: not built locally. Commit 2's change is intptr_t instead of s32, which is the same width there. CI will confirm.
• Sanitizer fixtures: not run locally. The build-macos CI job runs them.
• Multiplayer: not tested (also untested in Add native 64-bit macOS support #42).

Checklist

• My code has been thoroughly tested and is free of bugs
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• The commits I've made a clean, small and easy to understand (Add native 64-bit macOS support #42's port is one large commit, as it was in Add native 64-bit macOS support #42)
• My changes generate no compiler warnings (the macOS __DATA,__common alignment linker warning from Add native 64-bit macOS support #42 remains)
• My Code is AI-Generated or AI-assisted: Add native 64-bit macOS support #42 was written with Codex (GPT-6). The rebase, fix, packaging and testing here were done with Claude (Opus 5.5).
• My PR contains no AI-generated images, textures, models, sound or music
• I am an AI (this description was drafted by Claude at my request; I have reviewed it)
• I have reviewed my PR to make sure the above is truthful and accurate. I understand my PR can be rejected if it doesn't meet this project's standards.

Separate from this PR: RecompLauncher's Project Midas entry expects ProjectMidas-*-windows.7z and ProjectMidas-*-linux.7z, but 1.0.2b ships .zip. Once a macOS zip is in a release, the entry also needs "macos": "ProjectMidas-*-macos.zip".

🤖 Generated with Claude Code