k rain ian - language ▁books ▁Category : An th ologies ▁Category : 1 9 5 9 ▁books ▁Category : U k rain ian ▁books <0x0A> </s> ▁In ▁the ▁Apple ▁mac OS ▁operating ▁system , ▁a ▁package ▁is ▁a ▁file ▁system ▁directory ▁that ▁is ▁normally ▁displayed ▁to ▁the ▁user ▁by ▁the ▁F inder ▁as ▁if ▁it ▁were ▁a ▁single ▁file . ▁ ▁Such ▁a ▁directory ▁may ▁be ▁the ▁top - level ▁of ▁a ▁directory ▁tree ▁of ▁objects ▁stored ▁as ▁files , ▁or ▁it ▁may ▁be ▁other ▁arch ives ▁of ▁files ▁or ▁objects ▁for ▁various ▁purposes , ▁such ▁as ▁installer ▁packages , ▁or ▁backup ▁arch ives . ▁ ▁Definition ▁The ▁package ▁is ▁a ▁common ▁file ▁system ▁abstra ction ▁used ▁by ▁Apple ▁operating ▁systems , ▁such ▁as ▁mac OS ▁and ▁iOS . ▁It ▁is ▁a ▁directory ▁that ▁may ▁contain ▁a ▁hierarchy ▁of ▁files ▁or ▁objects ▁that ▁represent ▁a ▁preserved , ▁organized ▁state . ▁A ▁package ▁is ▁displayed ▁to ▁users ▁like ▁a ▁single ▁file ▁in ▁the ▁F inder ▁application ▁to ▁avoid ▁being ▁changed ▁by ▁the ▁user . ▁However , ▁the ▁content ▁of ▁packages ▁may ▁be ▁accessed ▁through ▁special ▁keyboard ▁and ▁mouse ▁combination ▁events . ▁For ▁this ▁purpose , ▁the ▁control - click , ▁or ▁right - click , ▁menu ▁displays ▁a ▁directive ▁Show ▁Package ▁Cont ents . ▁ ▁Some ▁documents ▁may ▁be ▁represented ▁as ▁packages : ▁Rich ▁Text ▁Format ▁documents ▁with ▁images , ▁which ▁carry ▁the ▁. rt fd ▁extension ; ▁D ash board ▁widget s ; ▁partially ▁downloaded ▁files ▁in ▁Safari , ▁which ▁carry ▁the