Apple MacBook (Retina, 12-inch, Early 2015) vs Apple MacBook Air (Retina, 13-inch, 2018)

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

MacBook (Retina, 12-inch, Early 2015) compared with MacBook Air (Retina, 13-inch, 2018)
AppleMacBook (Retina, 12-inch, Early 2015)AppleMacBook Air (Retina, 13-inch, 2018)
Overview
ReleasedApril 2015November 2018
Display
Screen size12″13.3″
Resolution2304 × 14402560 × 1600 (better)
PanelIPS LCDIPS LCD
TouchscreenNoNo
Display typeRetina display; LED-backlit IPS; 16:10 aspect ratio; millions of coloursRetina display; LED-backlit IPS; 16:10 aspect ratio
Pixel density226 ppi227 ppi
Colour range–Millions of colours; sRGB rather than P3 (Macworld)
Display featuresSupported scaled resolutions of 1440 × 900, 1280 × 800 or 1024 × 640–
Performance
ProcessorIntel Core M-5Y31, Intel Core M-5Y51 or Intel Core M-5Y71Intel Core i5-8210Y
CPU cores22
CPU threads44
GraphicsIntel HD Graphics 5300Intel UHD Graphics 617
Memory8 GB8 GB or 16 GB (better)
Storage256 GB to 512 GB128 GB to 1.536 TB (better)
CPUDual-core Intel Core M at Apple's specified 1.1 GHz with Turbo Boost up to 2.4 GHz, 1.2 GHz with up to 2.6 GHz, or 1.3 GHz with up to 2.9 GHz; all with 4 MB shared L3 cache. Exact M-5Y31, M-5Y51 and M-5Y71 identifiers confirmed by Macworld. Apple's configured clocks differ from Intel's nominal base frequencies; the M-5Y31 supports a configurable TDP-up frequency of 1.1 GHz.Eighth-generation dual-core Intel Core i5 at 1.6 GHz, Turbo Boost up to 3.6 GHz, with 4 MB L3 cache; exact i5-8210Y identifier confirmed by Macworld and TechRadar. Apple T2 Security Chip with secure boot and storage encryption.
GPUIntel HD Graphics 5300Intel UHD Graphics 617; compatible Thunderbolt 3 external graphics processors supported
Memory type8 GB of 1600 MHz LPDDR3 onboard memory8 GB or 16 GB of 2133 MHz LPDDR3 onboard memory
Storage typePCIe-based onboard flash storage; 256 GB with the 1.1 GHz base or 512 GB with the 1.2 GHz base; either can be ordered with the 1.3 GHz processorPCIe-based SSD; 128 GB or 256 GB standard, configurable to 512 GB or 1.5 TB
CoolingFanless design with no moving parts or vents–
Battery and size
Battery life (maker's claim)Up to 10 hoursUp to 13 hours
Battery capacity39.7 Wh50.3 Wh (better)
Weight0.92 kg (better)1.25 kg
Thickness13.1 mm (better)15.6 mm
Width × depth280.5 × 196.5 mm304.1 × 212.4 mm
Battery life detailTerraced lithium-polymer battery; up to 9 hours wireless web, 10 hours iTunes movie playback or 30 days standby. Apple's web and video tests used the 1.2 GHz Core M, 8 GB memory and 512 GB storage. Chassis tapers from 3.5 to 13.1 mm; weight varies by configuration and manufacturing process.Up to 12 hours wireless web, 13 hours iTunes movie playback or 30 days standby; lithium-polymer. Apple's tests used 8 GB RAM and 256 GB storage. Chassis height tapers from 4.1 to 15.6 mm; weight varies by configuration and manufacturing process.
Charger29 W USB-C Power Adapter30 W USB-C Power Adapter; USB-C charging
MaterialsPrecision-milled aluminium unibody; polished stainless steel Apple logo100% recycled aluminium enclosure
ColoursSilver, Gold, Space GreyGold, Silver, Space Grey
Connections
PortsUSB-C, headphone jack2 × Thunderbolt 3, headphone jack
Wi-FiWi-Fi 5Wi-Fi 5
Bluetooth4.04.2
Webcam480p FaceTime720p FaceTime HD
Operating systemmacOSmacOS
Port detailOne USB-C port supporting charging, USB 3.1 Gen 1 up to 5 Gb/s and native DisplayPort 1.2; VGA and HDMI through separate USB-C multiport adaptors. 3.5 mm headphone jack supports iPhone headsets with remote and microphone. USB-C does not support Thunderbolt (Macworld).Two Thunderbolt 3 USB-C ports with charging, DisplayPort, Thunderbolt up to 40 Gb/s and USB 3.1 Gen 2 up to 10 Gb/s; 3.5 mm headphone jack
External displaysOne external display up to 3840 × 2160 alongside the built-in screen, at millions of coloursOne display at 5120 × 2880 and up to 60 Hz, or two at 4096 × 2304 and up to 60 Hz alongside the built-in display; VGA, HDMI and Thunderbolt 2 through separate adaptors
KeyboardFirst-generation butterfly mechanism; full-size keyboard with 78 US or 79 ISO keys, individual LED backlighting, 12 function keys, four arrow keys and ambient light sensorThird-generation butterfly mechanism (Macworld); 78 US or 79 ISO individually LED-backlit keys, 12 function keys and four arrow keys; ambient light sensor
TrackpadForce Touch trackpad with pressure sensing, Force clicks and Multi-Touch gesturesForce Touch trackpad with pressure sensing and Multi-Touch gestures
SpeakersStereo speakersStereo speakers; wide stereo playback
MicrophonesDual microphonesThree microphones
Biometrics–Touch ID
In the boxMacBook; 29 W USB-C Power Adapter; USB-C Charge Cable (2 m)MacBook Air; 30 W USB-C Power Adapter; USB-C Charge Cable (2 m)

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