These are hard plastic shells that you can slide an individual card into to keep it safe from liquids, dents, or curling (foil curling is a big problem with Magic cards printed in the last few years)
I do not know if this works well on Mac
These cards have a pedigree too: Dimir Dredge | Extended | Yuuya Watanabe, Top 8 Pro Tour Austin 2009 Creatures (26) 1 Flame-Kin Zealot 1 Iona, Shield of Emeria 1 Sphinx of Lost Truths 3 Bloodghast 4 Drowned Rusalka 4 Golgari Grave-Troll 4 Hedron Crab 4 Narcomoeba 4 Stinkweed Imp Sorceries (11) 1 Life from the Loam 3 Dread Return 3 Ideas Unbound 4 Glimpse the Unthinkable Enchantments (4) 4 Bridge from Below Lands (19) 2 Island 1 Steam Vents 2 Breeding Pool 3 Verdant Catacombs 3 Watery Grave 4 Misty Rainforest 4 Scalding Tarn Sideboard (15) 1 Life from the Loam 4 Leyline of the Void 3 Thoughtseize 3 Echoing Truth 2 Darkblast 2 Ancient Grudge Sure it was a different format and Bridge From Below, Golgari Grave-Troll, and Dread Return were all legal, but the concept is there
Captain Pikachu also appears as an alternate art reprint, tying the two sets together
Illustrated by Michael Phillippi Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
Unfortunately this is limited mostly to creatures and not permanents of other varieties