| 1 | A | B | C | D |
| --- | --- | --- | --- | --- |
| 2 | MacBook (2015–present) - Technical specifications |  |  |  |
| 3 | Model | Early 2015 | Early 2016 | Mid 2017 |
| 4 | Release date | April 10, 2015 | April 19, 2016 | June 6, 2017 |
| 5 | Model identifier | MacBook8,1 | MacBook9,1 | MacBook10,1 |
| 6 | Model Number | A1534 | A1534 | A1534 |
| 7 | Order Numbers | MF855LL/A, MF865LL/A, MJY32LL/A, MJY42LL/A, MK4M2LL/A, MK4N2LL/A | MLH72LL/A, MLH82LL/A, MLHA2LL/A, MLHC2LL/A, MLHE2LL/A, MLHF2LL/A, MMGL2LL/A, MMGM2LL/A | MNYF2LL/A, MNYG2LL/A, MNYH2LL/A, MNYJ2LL/A, MNYK2LL/A, MNYL2LL/A, MNYM2LL/A, MNYN2LL/A |
| 8 | Display | LED-backlit widescreen glossy, Retina Display | LED-backlit widescreen glossy, Retina Display | LED-backlit widescreen glossy, Retina Display |
| 9 | Display | 12" Retina, 2304 × 1440 (16:10), 226 ppi, with millions of colors (supported scaled resolutions: 1440 × 900, 1280 × 800, 1024 × 640) | 12" Retina, 2304 × 1440 (16:10), 226 ppi, with millions of colors (supported scaled resolutions: 1440 × 900, 1280 × 800, 1024 × 640) | 12" Retina, 2304 × 1440 (16:10), 226 ppi, with millions of colors (supported scaled resolutions: 1440 × 900, 1280 × 800, 1024 × 640) |
| 10 | Video camera | iSight (480p) | iSight (480p) | iSight (480p) |
| 11 | Processor | 1.1 GHz (M-5Y31) dual-core Intel Core M Broadwell processor (Turbo Boost up to 2.4 GHz) with 4 MB L3 cache1 1.2 GHz (M-5Y51) dual-core Intel Core M Broadwell processor (Turbo Boost up to 2.6 GHz) with 4 MB L3 cache1 Configurable 1.3 GHz (M-5Y71) dual-core Intel Core M Broadwell processor (Turbo Boost up to 2.9 GHz) with 4 MB L3 cache1 | 1.1 GHz dual-core Intel Core m3-6Y30 Skylake processor (cTDP Up mode, Turbo Boost up to 2.2 GHz) with 4MB L3 cache 1.2 GHz dual-core Intel Core m5-6Y54 Skylake processor (cTDP Up mode, Turbo Boost up to 2.7 GHz) with 4MB L3 cache Configurable 1.3 GHz dual-core Intel Core m7-6Y75 Skylake processor (cTDP Up mode, Turbo Boost up to 3.1GHz) with 4 MB L3 cache | 1.2 GHz dual-core Intel Core m3-7Y32 Kaby Lake processor (Turbo Boost up to 3.0GHz) with 4MB L3 cache 1.3 GHz dual-core Intel Core i5-7Y54 Kaby Lake processor (Turbo Boost up to 3.2 GHz) with 4MB L3 cache Configurable 1.4 GHz dual-core Intel Core i7-7Y75 Kaby Lake processor (Turbo Boost up to 3.6GHz) with 4 MB L3 cache |
| 12 | System bus | N/A | 4 GT/s OPI (Max. Theoretical Bandwidth 4 GB/s) | 4 GT/s OPI (Max. Theoretical Bandwidth 4 GB/s) |
| 13 | Memory | 8 GB 1600 MHz LPDDR3 SDRAM | 8 GB 1866 MHz LPDDR3 SDRAM | 8 GB 1866 MHz LPDDR3 SDRAM Configurable to 16 GB of RAM at time of purchase only |
| 14 | Graphics | Intel HD Graphics 5300 with LPDDR3 SDRAM shared with main memory | Intel HD Graphics 515 with LPDDR3 SDRAM shared with main memory | Intel HD Graphics 615 with LPDDR3 SDRAM shared with main memory |
| 15 | Flash storage | 256 GB or 512 GB NVMe/PCIe 2.0 x4, 5.0 GT/s | 256 GB or 512 GB NVMe/PCIe 3.0 x2, 8.0 GT/s | 256 GB or 512 GB NVMe |
| 16 | WiFi | Integrated 802.11a/b/g/n/ac (2.4 & 5 GHz, up to 1.3 Gbit/s) | Integrated 802.11a/b/g/n/ac (2.4 & 5 GHz, up to 1.3 Gbit/s) | Integrated 802.11a/b/g/n/ac (2.4 & 5 GHz, up to 1.3 Gbit/s) |
| 17 | Bluetooth | Bluetooth 4.0 | Bluetooth 4.0 | Bluetooth 4.2 |
| 18 | Peripheral connections | USB 3.1 generation 1 over USB-C, up to 5 Gbit/s (for power, converts to USB Type-A, and video out via separate adapter) | USB 3.1 generation 1 over USB-C, up to 5 Gbit/s (for power, converts to USB Type-A, and video out via separate adapter) | USB 3.1 generation 1 over USB-C, up to 5 Gbit/s (for power, converts to USB Type-A, and video out via separate adapter) |
| 19 | Peripheral connections | Headphone audio jack (supports iPhone headset with remote and microphone) | Headphone audio jack (supports iPhone headset with remote and microphone) | Headphone audio jack (supports iPhone headset with remote and microphone) |
| 20 | Video out | USB-C DisplayPort 1.2 Alternate Mode (maximum resolutions 4096x2304 at 48 Hz over HDMI 1.4b, and 3840x2160 at 60 Hz over DisplayPort and HDMI 1.4b) | USB-C DisplayPort 1.2 Alternate Mode (maximum resolutions 4096x2304 at 60 Hz over HDMI 2.0, and 3840x2160 at 60 Hz over DisplayPort) | USB-C DisplayPort 1.2 Alternate Mode (maximum resolutions 4096x2304 at 60 Hz over HDMI 2.0, and 3840x2160 at 60 Hz over DisplayPort) |
| 21 | Power | 29 Watt USB 3.1 Type-C power adapter, 39.7 Wh battery | 29 Watt USB 3.1 Type-C power adapter, 41.4 Wh battery | 29 Watt USB 3.1 Type-C power adapter, 41.4 Wh battery |
| 22 | Weight | 2.03 pounds (0.92 kg) | 2.03 pounds (0.92 kg) | 2.03 pounds (0.92 kg) |
| 23 | Dimensions | 11.04 inches (28.04 cm) wide × 7.74 inches (19.66 cm) deep × 0.14 inches (0.36 cm) to 0.52 inches (1.32 cm) high | 11.04 inches (28.04 cm) wide × 7.74 inches (19.66 cm) deep × 0.14 inches (0.36 cm) to 0.52 inches (1.32 cm) high | 11.04 inches (28.04 cm) wide × 7.74 inches (19.66 cm) deep × 0.14 inches (0.36 cm) to 0.52 inches (1.32 cm) high |
| 24 | Colors | Space Gray, Silver, Gold | Space Gray, Silver, Gold, Rose Gold; in 2018, Rose Gold and Gold (original) were replaced with a new Gold | Space Gray, Silver, Gold, Rose Gold; in 2018, Rose Gold and Gold (original) were replaced with a new Gold |
| 25 | Keyboard | Butterfly mechanism | Butterfly mechanism | Second-generation butterfly mechanism |

Question: How did Apple improve on the MacBook on April 19, 2016?
Answer: On April 19, 2016, Apple updated the MacBook with Intel HD 515 graphics and a new gold finish.