I've attached an image of the Snowdown shop error,
Bug: Won't let you purchase skins in Snowdown shop
Reproduce: unlock all of your gifts for Snowdown
choose the one you would like to unlock
click yes and watch as the error pops up
i am also on a mac if that effects anything and my client is up to date.
Post feedback on new game features, improvements, champions, Items, map balance, new skins, gameplay experiments, etc here.
All bug reports live in the [Bugs board](http://community.pbe.leagueoflegends.com/c/bugs).
If you experience a bug or a feature not functioning as intended, please post in the Bugs forum. This board is for feedback and opinions on new features.