Ngeli thuba siza kuzinikela ekuthetheni ngembali ye Iinkqubo zokusebenza kweMac OS. Inguqulelo yokuqala ye Mac OSInkqubo 1 yayine desktop, iifestile, ii icon, imouse, iimenyu, kunye neebar zokuhambisa. Ngalo lonke ixesha ikhompyutha iqalwa kwakhona, lonke ulwazi luye lwalahleka. Ukongeza, awungekhe usebenze kwizicelo ezibini ngaxeshanye kuba kwakungekho nkumbulo ebonakalayo. Kwakungenakwenzeka ukwenza incwadi eneenkcukacha ngaphakathi kwenye ifolda, kuba zonke iifayile zazigcinwe kwicala elinye kwidiski.
Kuphela ngo-1988, kunye neNkqubo yesi-6, imibala yongezwa. Iqhosha longezwa kukhetho lwe "Erase Disk" ukuze ukwazi ukucima eli nyathelo, ukhetho lokubonisa inombolo yenguqulo yefayile nayo yongezwa.
Kwiminyaka emibini kamva, ngo-1990, iNkqubo yesi-7 yathetha utshintsho olukhulu lwesoftware ngeli xesha, njengoko inkumbulo yaphucula amandla ayo ukuya kuma-32b, evumela iiMacs ukuba zisebenzise ngaphezulu kwe-8 MB yeRam kwinkqubo yokusebenza.
Inguqulelo yeshumi kunye neyokugqibela yenkqubo yokusebenza ye-Apple yile Mac OS X, ekhutshwe ngo-2002. Kufanelekile ukuba sikhankanye ukuba le nkqubo yokusebenza isekwe kwi-UNIX. Kubalulekile ukuba uqaphele ukuba le nguqulo yazisa ngemisebenzi eyahlukeneyo yokubonelela abasebenzisi bayo ngeqonga elisebenzayo nelizinzileyo kunenguqulo yangaphambili (Mac OS 9). Phakathi kwabo sinokukhankanya ukukhusela izinto ezininzi kunye nenkumbulo ekhuselweyo, ngokungathandabuzekiyo ephucule amandla enkqubo yokuqhuba usetyenziso olwahlukeneyo ngaxeshanye.