How do I get the silver dapple pinto from the Albert mason mission.

So I’ve manage to successfully track the Horse but I can’t get a “jump to horse” button to come up. Do I need a faster horse(mine is pretty slow) or is there another way to mount it and get it? Also if there are any other ways to get an MFT because I don’t know any others and I just want an MFT bc this is my second playthrough and I bought the one in the epilogue and loved it.

Edit: just before the cut scene after you chase the horses to Albert, enter tracking mode of the MFT. Then skip through the cutscene and enter tracking mode. You should see the track of the MFT. Follow the track while entering tracking mode often, and you should eventually see the horse. Run alongside it, and stop tracking it. Once you stop tracking it and run alongside it, you should be able to jump on. This usually takes a long time, and if it leaves your field of view while you are not tracking it, it disappears. DO NOT GET OFF, save the game, take it to a stable and saddle it up, save the game, reload that game and you should have it. Worked for me exactly like this.