Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Musi waFebruary 24, 2011, wekutanga wekuvandudza mufananidzo weShumba (11A390) yakaburitswa kune vanyoreri kuApple Developer chirongwa. Zvimwe zvekuvandudza zvakaburitswa gare gare, neShumba Preview 4 (11A480b) ichiburitswa paWWDC 2011.Shumba yakaburitswa mukugadzira musi waChikunguru 1, 2011, ichiteverwa nekuburitswa kwayo kwekupedzisira kuburikidza neMac App Store musi waChikunguru 20, 2011. Apple yakashuma kutengeswa kweShumba kunopfuura miriyoni imwe pazuva rokutanga rokubudiswa kwayo. Muna Gumiguru 2011, Mac OS X Lion yakanga yatengesa makopi anopfuura mamirioni matanhatu pasi rese. Shumba ndiyo yekupedzisira kuburitswa iyo kuvandudzwa kwayo kwakatarisirwa naBertrand Serlet, anoonekwa se "baba vekutanga veMac OS X".  Mubvunzo: Vanyoreri vepurogiramu yeApple Developer vakagamuchira rini kuratidzwa kwokutanga kweShumba?
Musi waFebruary 24, 2011