What is Requiem?
Requiem (out of development since 2012) is a program that removes Apple's DRM (called FairPlay) from songs, videos, and books purchased on iTunes. (It doesn't work on video rentals.) This allows content purchased on iTunes to be played on non-Apple-approved devices, like Xbox, PS4, Android phone, etc. The DRM removal is a lossless process, it is merely decrypting the file, not decoding and re-encoding it, meaning no quality is lost when the DRM is removed. There is no need to 'play' the tracks, it quickly decrypts them in place. For every .m4p file you get a matching .m4a file, for every .m4v you get an .mp4.
Is Requiem Still Workable to Remove iTunes DRM?
Most probably, you can no longer use Requiem to remove DRM from iTunes movies and music. Requiem has been out of development since 2012 with the promise from Brahms, the owner of the project. Brahms confirmed that Requiem 4.1 is the last official release and no updates anymore. Requiem 4.1 is limited to work under iTunes version lower than v.10.7, that is, you are unable to remove DRM from iTunes video or music with Requiem if you have iTunes higher than v.10.7. Today, most people (probably including you and me) are using iTunes 12 or the later, so we are unable to use Requiem any more.
Is There Any Alternative Software as Requiem to Help Remove iTunes DRM?
Yes. There are even some iTunes DRM Removal softwares better than Requiem. Here I want to recommend you two of them.
#1. iTunes M4V Converter - Remove DRM from iTunes Movies & Rentals
Why iTunes M4V Converter is better than Requiem? It can not only remove DRM from purchased iTunes movies, but also rented iTunes movies. It means that you can even remove the 24 hours' limitation for rented movies and keep them forever now.
Remove DRM Protection from iTunes Rentals & Purchases
Convert iTunes M4V to MP4 formats without quality loss
Keep AC3 5.1 audio and all multilingual subtitles & audio tracks
Support 1080p HD movies
Fully compatible with macOS 10.12 Sierra and iTunes 12.5
Note: iTunes M4V Converter can only be run on Mac. For windows users, you can take DRM Media Converter in place.
#2. Apple Music Converter - Remove DRM from Apple Music & iTunes Songs
With the release of Apple Music, less and less users buy songs from iTunes store. So instead of considering about how to remove DRM from iTunes songs, people are more concerned about how to remove DRM from Apple Music. Apple Music Converter is such a program which can not only remove DRM from Apple Music, but also your old iTunes songs and Audile audiobooks.
Remove DRM from Apple Music tracks and iTunes M4P songs
Convert Apple Music to Plain MP3/AC3/FLAC for playback on any device
Remove DRM from protected M4B, M4A, AA, AAX audiobooks on iTunes and Audible
Keep ID tags and metadata information in output MP3, M4A files
Support both Windows 10/8/7 and Mac OS 10.9.5 - 10.12