PROJ
PROJ is a geographic coordinate transformation framework developed by Maptools, providing libraries and tools for converting between different spatial reference systems (projections, datums, coordinate systems). It is widely used by GIS software, mapping applications, spatial analysis tools, and geospatial research projects to handle coordinate system definitions and transformations. PROJ is typically embedded as a framework within larger geospatial applications rather than run as a standalone tool, and many R, Python, GDAL-based and other scientific computing environments depend on it.
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1 suggestionPROJ is a framework component, not a standalone application — it is embedded within larger GIS, mapping, or scientific computing software rather than installed or updated on its own. To ensure you have a native Apple Silicon build of PROJ, you must update the parent application that uses it. If you use PROJ through R (via the sf, sp, or similar spatial packages), update R itself to version 4.3 or later and reinstall your R packages; R-universe and CRAN now provide native arm64 binaries for R packages that depend on PROJ. If you use PROJ through GDAL, QGIS, ArcGIS, or other GIS software, update that application to its latest version — most modern releases ship native Apple Silicon builds that include a native PROJ framework. Do not attempt to download or update PROJ separately. Check the documentation or support page of whichever application embeds PROJ to confirm it is on a current version with native Apple Silicon support before macOS 28 removes Rosetta 2 in September 2028.
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