Rubuta ci gaba ga wannan sakin layi - "Mackinac" ya koma Saipan a watan Afrilu 1945. A ranar 11 ga Mayu, 1945, ta shiga cikin rukunin jirgin ruwa da ke Kerama Retto a Tsibirin Ryukyu yayin yakin Okinawa, kuma ta ci gaba da yin ayyuka iri-iri, gami da ceton iska-teku da kuma harbi da tsibirin Rose Island da ke hannun Japan. Bayan da rukunin jirgin ruwa ya koma ayyukansa zuwa Okinawa a ranar 14 ga Yuli, 1945, "Mackinac" ya kula da jiragen ruwa na torpedo har zuwa farkon watan Agustan 1945. Bayan Jafananci sun mika wuya
a ranar 15 ga watan Agustan 1945, an sanya shi don shiga Task Group 30.5, ya isa Sagami Bay, Tokyo, Japan, a ranar 28 ga watan Agustan 1945.