On December 6, 2018, Microsoft announced its intent to base Edge on the Chromium source code, using the same rendering engine as Google Chrome but with enhancements developed by Microsoft. It was also announced that there will be versions of Edge available for Windows 7, Windows 8, and macOS, and that all versions will be updated on a more frequent basis. On April 8, 2019, the first of the new Edge for Windows were released to the public. On May 20, 2019, the first preview builds of Edge for macOS were released to the public, marking the first time in 13 years that a Microsoft browser was available on the Mac platform. The last time a Microsoft browser was available on the Mac platform was Microsoft Internet Explorer for Mac, which was withdrawn in January 2006. On June 2019 IAmA post on Reddit, an Edge developer stated that it was theoretically possible for a Linux version to be developed in the future, but no work had actually started on that possibility. On June 19, 2019, Microsoft made Edge available on both Windows 7 and Windows 8 for testing. On August 20, 2019, Microsoft made its first beta build of Edge available. The beta marks a major milestone, as it is the final stage before the stable version is available. The beta is available for Windows 7, Windows 8, Windows 10, and macOS. August 2019 also saw the removal of support for the EPUB file format. At Microsoft Ignite, Microsoft released an updated version of the Edge logo. The new Edge was released on January 15, 2020. Support for the new Edge on Windows 7 will end in July 2021. Early benchmarks of the EdgeHTML engine—included in the first beta release of Edge in Windows 10 Build 10049—had drastically better JavaScript performance than Trident 7 in Internet Explorer 11, with similar performance to Google Chrome 41 and Mozilla Firefox 37. In the SunSpider benchmark, Edge performed faster than other browsers, while in other benchmarks it operated slower than Google Chrome, Mozilla Firefox, and Opera. Later benchmarks conducted with the version included in 10122 showed significant performance improvement compared to both IE11 and Edge back in 10049. According to Microsoft's benchmark result, this iteration of Edge performed better than both Chrome and Firefox in Google's Octane 2.0 and Apple's Jetstream benchmark. In July 2015, Edge scored 377 out of 555 points on the HTML5test. Chrome 44 and Firefox 42 scored 479 and 434 respectively, while Internet Explorer 11 scored 312. In August 2015, Microsoft released Windows 10 Build 10532 to insiders, which included Edge 21.10532.0.