Apple's free music creation software, GarageBand, hasn't been updated for about a year. Last summer, with version 10.2, the Mac app got a totally redesigned interface, Touch Bar support, and the ability to sync and edit projects between Mac and iOS.
This summer's 10.3 update is every bit as substantial, and perhaps even more so. It adds a huge number of new loops and sound effects, new instrument sounds, and it makes all the Artist Lessons free.
First introduced in 2009, Artist Lessons are a series of videos in which famous recording artists teach you how to play some of their most famous songs on guitar or piano. Sting will show you how to play "Roxanne" on guitar, while Norah Jones will teach you how to play "Thinking of You" on piano.