How a developer shipped a libmpv-based video player on the Mac App Store

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Developer Reel, a local video player and library app for macOS, was successfully submitted to the Mac App Store despite most mpv-based players distributing outside it. The process took about a month from first commit to approval, with the biggest hurdle being a JIT-related crash caused by LuaJIT's memory allocator conflicting with App Store sandbox entitlement rules. The fix was a single build-flag change to disable Lua entirely, since the app never used mpv's scripting features, which also eliminated the need for two otherwise-required entitlements. Additional challenges included LGPL compliance with static linking, two sandbox traps that only surfaced after local testing, and a design rejection. The developer published the experience as a field guide for anyone integrating FFmpeg or libmpv into a sandboxed Mac app.

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