Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
MacBook (2015–present)
Table title:
Technical specifications
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Model </th><th colspan=1 rowspan=1 > Early 2015 </th><th colspan=1 rowspan=1 > Early 2016 </th><th colspan=1 rowspan=1 > Mid 2017 </th></tr>
<tr> <th colspan=1 rowspan=1 > Release date </th><td colspan=1 rowspan=1 > April 10, 2015 </td><td class="highlighted"  colspan=1 rowspan=1 > April 19, 2016 </td><td colspan=1 rowspan=1 > June 6, 2017 </td></tr>
<tr> <th colspan=1 rowspan=1 > Model identifier </th><td colspan=1 rowspan=1 > MacBook8,1 </td><td colspan=1 rowspan=1 > MacBook9,1 </td><td colspan=1 rowspan=1 > MacBook10,1 </td></tr>
<tr> <th colspan=1 rowspan=1 > Model Number </th><td colspan=3 rowspan=1 > A1534 </td></tr>
<tr> <th colspan=1 rowspan=1 > Order Numbers </th><td colspan=1 rowspan=1 > MF855LL/A, MF865LL/A, MJY32LL/A, MJY42LL/A, MK4M2LL/A, MK4N2LL/A </td><td colspan=1 rowspan=1 > MLH72LL/A, MLH82LL/A, MLHA2LL/A, MLHC2LL/A, MLHE2LL/A, MLHF2LL/A, MMGL2LL/A, MMGM2LL/A </td><td colspan=1 rowspan=1 > MNYF2LL/A, MNYG2LL/A, MNYH2LL/A, MNYJ2LL/A, MNYK2LL/A, MNYL2LL/A, MNYM2LL/A, MNYN2LL/A </td></tr>
<tr> <th colspan=1 rowspan=2 > Display </th><td colspan=3 rowspan=1 > LED-backlit widescreen glossy, Retina Display </td></tr>
<tr> <td colspan=3 rowspan=1 > 12" Retina, 2304 × 1440 (16:10), 226 ppi, with millions of colors (supported scaled resolutions: 1440 × 900, 1280 × 800, 1024 × 640) </td></tr>
<tr> <th colspan=1 rowspan=1 > Video camera </th><td colspan=3 rowspan=1 > iSight (480p) </td></tr>
<tr> <th colspan=1 rowspan=1 > Processor </th><td colspan=1 rowspan=1 > 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 </td><td colspan=1 rowspan=1 > 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 </td><td colspan=1 rowspan=1 > 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 </td></tr>
<tr> <th colspan=1 rowspan=1 > System bus </th><td colspan=1 rowspan=1 > N/A </td><td colspan=2 rowspan=1 > 4 GT/s OPI (Max. Theoretical Bandwidth 4 GB/s) </td></tr>
<tr> <th colspan=1 rowspan=1 > Memory </th><td colspan=1 rowspan=1 > 8 GB 1600 MHz LPDDR3 SDRAM </td><td colspan=1 rowspan=1 > 8 GB 1866 MHz LPDDR3 SDRAM </td><td colspan=1 rowspan=1 > 8 GB 1866 MHz LPDDR3 SDRAM Configurable to 16 GB of RAM at time of purchase only </td></tr>
<tr> <th colspan=1 rowspan=1 > Graphics </th><td colspan=1 rowspan=1 > Intel HD Graphics 5300 with LPDDR3 SDRAM shared with main memory </td><td class="highlighted"  colspan=1 rowspan=1 > Intel HD Graphics 515 with LPDDR3 SDRAM shared with main memory </td><td colspan=1 rowspan=1 > Intel HD Graphics 615 with LPDDR3 SDRAM shared with main memory </td></tr>
<tr> <th colspan=1 rowspan=1 > Flash storage </th><td colspan=1 rowspan=1 > 256 GB or 512 GB NVMe/PCIe 2.0 x4, 5.0 GT/s </td><td colspan=1 rowspan=1 > 256 GB or 512 GB NVMe/PCIe 3.0 x2, 8.0 GT/s </td><td colspan=1 rowspan=1 > 256 GB or 512 GB NVMe </td></tr>
<tr> <th colspan=1 rowspan=1 > WiFi </th><td colspan=3 rowspan=1 > Integrated 802.11a/b/g/n/ac (2.4 & 5 GHz, up to 1.3 Gbit/s) </td></tr>
<tr> <th colspan=1 rowspan=1 > Bluetooth </th><td colspan=2 rowspan=1 > Bluetooth 4.0 </td><td colspan=1 rowspan=1 > Bluetooth 4.2 </td></tr>
<tr> <th colspan=1 rowspan=2 > Peripheral connections </th><td colspan=3 rowspan=1 > 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) </td></tr>
<tr> <td colspan=3 rowspan=1 > Headphone audio jack (supports iPhone headset with remote and microphone) </td></tr>
<tr> <th colspan=1 rowspan=1 > Video out </th><td colspan=1 rowspan=1 > 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) </td><td colspan=2 rowspan=1 > USB-C DisplayPort 1.2 Alternate Mode (maximum resolutions 4096x2304 at 60 Hz over HDMI 2.0, and 3840x2160 at 60 Hz over DisplayPort) </td></tr>
<tr> <th colspan=1 rowspan=1 > Power </th><td colspan=1 rowspan=1 > 29 Watt USB 3.1 Type-C power adapter, 39.7 Wh battery </td><td colspan=2 rowspan=1 > 29 Watt USB 3.1 Type-C power adapter, 41.4 Wh battery </td></tr>
<tr> <th colspan=1 rowspan=1 > Weight </th><td colspan=3 rowspan=1 > 2.03 pounds (0.92 kg) </td></tr>
<tr> <th colspan=1 rowspan=1 > Dimensions </th><td colspan=3 rowspan=1 > 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 </td></tr>
<tr> <th colspan=1 rowspan=1 > Colors </th><td colspan=1 rowspan=1 > Space Gray, Silver, Gold </td><td class="highlighted"  colspan=2 rowspan=1 > Space Gray, Silver, Gold, Rose Gold; in 2018, Rose Gold and Gold (original) were replaced with a new Gold </td></tr>
<tr> <th colspan=1 rowspan=1 > Keyboard </th><td colspan=2 rowspan=1 > Butterfly mechanism </td><td colspan=1 rowspan=1 > Second-generation butterfly mechanism </td></tr>
</table>
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.