At WWDC 2018 Apple announced that in the future it will become possible to run iOS apps on macOS. Rumours about this first appeared in December 2017 and was believed to be codenamed Marzipan. Although there is no official API or support for it yet in this talk Tom Lokhorst shows how he experimented with Marzipan and what he learned. This talk was recorded on November 2nd, 2018 during the Do iOS 2018 conference of CocoaHeadsNL in Amsterdam. See https://www.do-ios.com/ for more information.