On macOS the Tauri toolchain relies on the system frameworks that ship with the OS: Cocoa, WebKit, and CoreFoundation. The build links against the macOS SDK that the Xcode Command Line Tools install. There is no apt-equivalent step here — no brew install of system packages is required.
One environment variable to know: MACOSX_DEPLOYMENT_TARGET. The repo pins it via Cargo.toml and the tauri.conf.json minimumSystemVersion field. If a downstream toolchain disagrees (an older Xcode CLT, for example), set it explicitly in the shell before running tauri build:
export MACOSX_DEPLOYMENT_TARGET=11.0
npm run tauri build
The default target matches the macOS Big Sur baseline (11.0). Big Sur and newer are supported; older macOS releases fall outside the build matrix.