#showtooltip
/click [nomod] MountJournalSummonRandomFavoriteButton
/use [mod,nospec:2] Spiritwalker's Grace; [mod] Spirit Walk; Ghost Wolf
Because mounting is off of the global cooldown, it’ll attempt to trigger your favorite mount button (but only if possible, thus canceling/ignoring the followup attempt to cast Ghost Wolf). This also means that if you’re character is moving (and not standing still), it’ll skip the mount action and just use Ghost Wolf instead.
I wasn’t certain if it’d be better to post this here or in WoW Macros instead, but it’s more useful to folks here, so…
You could modify this (if desired) to instead cast Water Walking on yourself just before mounting (again, since mounting is off the global cooldown).
The [mod] function is just a bonus, since those abilities are movement-oriented.