Features Digital Research removed from GEM on account of the lawsuit included disk drive icons on the desktop, movable and resizable home windows within the file supervisor, shading in the title bars, and window open/close animations. In addition, visual parts together with the scrollbar thumbs and the window close button had been modified to be less just like these in the Mac GUI. In 2019, Apple sued security start-up Corellium for creating the first virtual iPhone-simulating software program. The product was created with the intent of serving to users research safety points in iOS.