Blog Post: Bringing Back the Classics—How to Install iTunes 10 on Modern Mac
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or later, iTunes has been discontinued. Its functionality is now split across several dedicated apps: Apple Music : For your music library and the iTunes Store. : For movies and TV shows. Apple Podcasts & Books : For podcasts and audiobooks respectively. Blog Post: Bringing Back the Classics—How to Install
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While iTunes 10.4.1 is a vital tool for vintage Mac enthusiasts, be wary of "link" codes in email subjects. Always verify the file source before installing to protect your Mac from legacy malware.
Since Apple's main site only pushes the latest Music app, you'll need to head to the Apple Support Downloads