I found my Equus in the plains by the redwoods. (55, 25 ish). In the past few days, I’ve seen several in the southeastern rivers. Here’s some tips, orrr the entire process...
1 - Build a taming pen if you do not already have one, make sure the walls are high.
2 - Tame an Argentavis if you don’t already have one, don’t try this unless you’re a high enough level to get a saddle for it. An Argy can provide transportation, AND carry the Equus to the taming pen. If you are a lower level, spawn near one of those points up there ^^.
3 - Find the Equus. Few are located near the green obelisk, as well as the points at the top. The rivers are your best bet. Grab the Equus/Mount it. Bring your Equus to the taming pen.
4 - I suggest saving up amber for chef station and making dilo kibble, but you can use rockarrots and berries. (10 dilo kibble - lvl 1) (20+ rockarrots - lvl 1) (1000+ berries? - lvl 1)
5 - When you have food, mount the equus and feed it quickly. Continue. Equus is yours!
Run run run, crouch when close still approaching at an angle, when close enough,(stack of carrots in zero slot) click three “e” three times; one to feed, one to mount, one to start THE RIDE! Each time you get the feed prompt, hit “e” and pray it gets stuck in a corner and doesn’t run off a cliff, or into carnivores. Ignore everything but the prompt, hitting “e” without hesitation. (You cannot control the run at all). That’s it.