Use the Apple Support link above. The file will be named something like: iTunes12.8.3.dmg
Starting with macOS Catalina (10.15), Apple officially retired iTunes as a standalone application for Mac. Its features were split into three dedicated apps: : For your music library and streaming. Apple TV : For movies and shows. Apple Podcasts : For podcast subscriptions. itunes macos 10.13.99 download
Apple has abandoned the High Sierra user. But your music, your iPod, and your legacy iOS devices have not been abandoned. By following this guide, you can keep iTunes running on your “10.13.99” machine for another five years. Use the Apple Support link above
There is no actual macOS version "10.13.99"; this is a version check limit set by Apple to prevent the installation of iTunes on systems where it has been replaced. Apple Support Community Why You Can't Download iTunes Starting with macOS Catalina (10.15), Apple split iTunes Apple TV : For movies and shows
: On macOS 10.13, iTunes is already part of the operating system. You do not need to download it as a standalone app from the web.
Before you can download iTunes, it is important to understand the operating system version you listed.