http://www.mediafire.com/file/yipp3q38ivrlwc4/mac+os+sierra+10.12.rar  (mac os sierra)
http://www.mediafire.com/file/cjvq9ij356o9qqz/activacion+virtualbox.rar (activacion virtualbox)
http://www.mediafire.com/file/55d8dfwffbbt30e/ubuntu-18.04.1-desktop-amd64.iso/file (ubuntu)
https://mega.nz/#!4k9wGQDJ!Da6xCdIyI8Jvu_UmFgxxu27FZ6xW0nkgYrTUN64AWlw  (windows 8)
https://mega.nz/#!xo8TASQI!l-XLdmDSZgbAd7hxmugHrDoXh8FyOhBvvxSayVmEN6U  (serial windows 8)
https://mega.nz/#!1tVQhI5R!bKHe7E0zO2ay0DR-2AKBZirvYW1_tv4dS23kBxtM2rQ  (windows 7)