can be tricky because Apple often hides older versions from the standard App Store search. While many users look for a Google Drive link
Open this Apple support link: https://support.apple.com/en-us/HT211683 (Scroll down – it lists High Sierra) download mac os high sierra 1013 6 dmg google drive work
For the downloaded DMG to be functional, it must: can be tricky because Apple often hides older
Go to Internet Archive and search: macOS High Sierra 10.13.6 dmg They provide verified copies + checksums, and often include Google Drive mirrors. and often include Google Drive mirrors.