Information may or may not be accurate as I am pulling from multiple sources (forums, blogs and MAC PR official releases). If you have any updates or corrections, please post in the comments!
(GO TO THE 2015 RELEASE CALENDAR)

JANUARY
Huggable Lipcolour
Feminine Face
Vintage Vamp
Viva Glam Rihanna (review)

FEBRUARY
Lightful with Marine Bright Formula
A Fantasy of Flowers (review: fluidline) (review: lipstick) (review: face) (review: guest)
Prep + Prime CC Colour Correct (review: powder compact)
Prep + Prime Natural Radiance
Colour Carnival

MARCH
Mineralize Eye Shadow x4 Collection
MAC Travel Case
Mineralize Glass
Fall 14 Trend Forecast
Studio Sculpt
Altogether, Peachy

APRIL
Patentpolish Lip Pencil
MAC By Request 2014 Lipstick (review)
MAC By Request 2014 Eye Shadow
Très Cheek 2014
Pro Expansion
Studio Sculpt Shade And Line
Playland (info)
Pro Longwear
Cult Favorites (review: lip) (review: lipglass)
Proenza Schouler (review: lip) (info)
Flutterfly Eyes

MAY
Sized to Go 2014
3D Glitter
Maleficent (review: lipstick) (info)
Mineralize: Face 2014
Alluring Aquatic (review: lipstick) (info)
The Waterproof Brow

JUNE
Lorde (review) (info)
Pedro Lourenço (review: lipstick) (review: lipglass) (info)
Prep + Prime BB Beauty Balm (info)
Sharon and Kelly Osbourne (review: Sharon) (review: Kelly) (info: Sharon) (info: Kelly)
MAC Pro Lipstick
Marian Newman Transformations
MB/MES (repackage and extension)
Moody Blooms (review: eye) (review: lip) (info)

JULY
Nordstrom Anniversary
Studio Nail Lacquer Relaunch
Mineralize: Eyes 2014
Mineralize: Lip and Cheek 2014
Studio Multi-effect Lash

AUGUST
Veluxe Pearlfusion
A Novel Romance (review) (info)
Spring Trend Forecast

 

SEPTEMBER
Artificially Wild (info) – Aug 28 online, Sept 4 in stores
Casual Colour – Aug 28 online, Sept 4 in stores
Studio Sculpt (review)- Aug 28 online, Sept 4 in stores
The Simpsons Collection (info) – Aug 28 online, Sept 4 in stores
Turquatic 2014 – Aug 28 online, Sept 4 in stores
Matchmaster 2014 – Sept 4 online, Sept 11 in stores
Viva Glam Rihanna 2 (review) (info) – Sept 4 online, Sept 11 in stores

OCTOBER
Brooke Shields Beauty Icon (info) – Sept 25 online, Oct 2 in stores
Rocky Horror Picture Show (info) (review: FrankNFurter, Sin) – Sept 29 or Oct 2 (MAC store exclusive)
The Matte Lip (info) (review: Damn Glamorous, Fashion Revival) – Oct 2 online, Oct 9 in stores
Heirloom Mix Holiday Collection (info) (review: lipsticks) – Oct 20 online, Oct 23 in stores
Keepsakes Holiday Collection (info) – Oct 20 online, Oct 23 in stores
Objects of Affection Holiday Collection (info) – Oct 27 online, Nov 6 in stores
Ultimate Collection (info)- Oct 29 online, in stores

NOVEMBER
Kinky Boots (info) (review: lipstick) – Nov 13 (MAC Online Exclusive & Select MAC Stores)
Prabal Gurung (info) – Nov 20 online, Nov 26 in stores
Smoky Black Friday (info) – Nov 28

DECEMBER
Technokohl (info) – Nov 27 online, Dec 4 in stores
Red, Red, Red – Dec 8 online, Dec 18 in stores
Nasty Gal (info) (review: Gunner)- Dec 4 (MAC Online Exclusive & Select MAC Stores)
Lightness of Being (info) Dec 23 online and Dec 26 in stores
Prep + Prime extension – Dec 23 online and Dec 26 in stores
Studio Conceal & Correct – Dec 23 online and Dec 26 in stores
Boxing Friday – Dec 26 online only