Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: Na February 24, 2011, a tọhapụrụ onye mbụ na-emepụta ihe nke Lion (11A390) nye ndị debanyere aha na mmemme Apple Developer. A tọhapụrụ ndị mmepe ndị ọzọ, na Lion Preview 4 (11A480b) na WWDC 2011. E wepụtara Lion na mmepụta na July 1, 2011, na-esote ya site na mbipụta ikpeazụ ya site na Mac App Store na July 20, 2011. Apple kwupụtara ihe karịrị otu nde ahịa Lion n'ụbọchị mbụ nke ntọhapụ ya. Ka ọ na-erule Ọktọba 2011, Mac OS X Lion rere ihe karịrị nde isii n'ụwa niile. Ọdụm bụ mbipụta ikpeazụ nke mmepe ya bụ Bertrand Serlet, nke a na-ewere dị ka "nna ntọala nke Mac OS X".  Ajụjụ: Olee mgbe ndị debanyere aha Apple Developer program natara nlele mbụ nke ọdụm?
Febụwarị 24, 2011