"Because if the program is running, the installer won't be able to overwrite the old files, and the installation will fail halfway through."
This is a common Gatekeeper message for unsigned builds. Run in Terminal: sudo xattr -rd com.apple.quarantine /Applications/QGIS.app qgis 3.26 download
While QGIS is efficient, optimal performance for 3.26 typically requires: "Because if the program is running, the installer
Users typically download a standalone installer (roughly 1 GB in size). On Windows, this involves running the setup file, accepting the license agreement, and following the guided installation wizard. Impact on the Geospatial Community Changelog for QGIS 3.26 · QGIS Web Site "Because if the program is running
Rediscovering the Past: A Look Back at QGIS 3.26 ‘Buenos Aires’