. Many users stick with it because it is the last macOS to support certain "classic" software behaviors before the major design shift of Big Sur. Important Safety Note
Before you search Google for “macOS Catalina 10.15.7 ISO download free,” understand the risks: --- Macos Catalina 10.15.7 Iso Download
Apple does not provide an official “ISO” file for macOS. The official distribution is an .app bundle (Install macOS Catalina.app) downloaded from the App Store. An ISO is a disk image needed for virtual machines or legacy USB booting. --- Macos Catalina 10.15.7 Iso Download