Interesting.
Until Catalina, I had already visited all the spots for Apple's OS names beforehand.
Mavericks=Yup, been to that area and saw the big waves (never during the actual competition, though).
Yosemite=Been there too many times to count and have way too many sunset pictures of Half Dome to begin to count.
El Captain=Ditto. Been on top twice as well.
Sierra=Been to many places in the Sierras, including to the top of Mt Whitney twice (which is pictured in one of Apple's Wallpapers for Sierra).
High Sierra=Not really a separate place, but been to a lot of high and remote places in the Sierras.
Mojave=A real long time ago I did visit the desert and surrounding area.
Catalina=Never been to the island, but have seen it off the coast from LA.
The only wallpaper I actually tried to recreate was the High Sierra wallpaper, mostly because I was curious where that picture was taken so looked it up. North Lake in the Bishop Canyon. Since you could drive most of the way there, I'm not sure it really qualifies as being in the 'high sierra', but whatever.
So last year, I did go up to look for some fall color and did find the spot from where Apple's wallpaper was taken from:
My version:
Apple's version:
And my version tweaked in Photoshop a bit to make the color pop a bit more: