The file extension .dmg signifies a disk image file used by the macOS operating system. The specific iteration 11.5 refers to a significant update released by Adobe in mid-2022 for Lightroom Classic. If you possess this file or are attempting to update to this version, here is what you need to know about the software and the installation process.
: Ensure your macOS version is compatible. As of 2026, older 11.x versions may require macOS 11.0 (Big Sur) or newer. adobelightroomclassic115dmg upd