iTunes Releases Windows
iTunes Releases Windows IPSW Downloads has supported downloading iTunes versions for many years, however recently this task has become too challenging to maintain. As of iTunes 12.9, Apple no longer provide a direct download to the macOS versions of iTunes – they are only available via the macOS Mojave (and later) App Store.
This means that IPSW Downloads cannot retrieve the iTunes versions or download files, and therefore is unable to keep them up to date. IPSW Downloads will freeze its current iTunes versions and no longer attempt to find information about new ones.
iTunes 12.8 for macOS and iTunes 12.9 for Windows will be the last available iTunes downloads on ipsw.me and on the IPSW Downloads API.
For a manually updated list of iTunes versions and downloads (which is far more comprehensive than ipsw.me) please visit the iTunes page on TheiPhoneWiki.