These assume a vanilla ARM64 Mac running Sonoma, with Xcode or at least its command line tools, without Homebrew.
-
Build and install [https://cmake.org/download/] from source using
./configure && make && sudo make install -
Download the latest Arm GNU Toolchain .pkg file (or 13.1 if on an Intel Mac) from [https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads] and install it
-
in
~/Downloads/, rungit clone --depth 1 https://github.com/raspberrypi/pico-sdk.git && cd pico-sdk && git submodule update --init
mkdir -p build && cd build && cmake .. -DPICO_BOARD=pico2 && cd ..make -C build -j4
- Hold down BOOTSEL while plugging into USB
cp build/*.uf2 /Volumes/RP2350