12-inch MacBook discontinued with no replacement - 9to5Mac
Apple Macbook Retina Display Laptop (12 Inch Full-HD LED Backlit IPS Display, Intel Core M-5Y31 1.1GHz up to 2.4GHz, 8GB RAM, 256GB SSD, Wi-Fi, Bluetooth 4.0) Gold (Renewed)
12-inch MacBook (2015) review: Lighter than Air, but at a cost
Comment: A new 12-inch MacBook couldn't fit Apple's current Mac lineup
Apple Macbook Retina Display 12 Inch Core M-5Y31 1.1GHz 8GB RAM 256GB SSD (Renewed)
Apple MacBook 12-inch (2017): Unboxing & Review - YouTube
Review: Apple's 2016 12" MacBook is a welcome improvement, but won't change any minds | AppleInsider
The 12-inch MacBook: A Different Mac for a Particular User - TidBITS