How to Restore IPSW on iPhone WithoutUsing iTunes
Whatyouwantistoeraseallcontentandsettingswhichreturnsthedevicetothesetupassistandwiththecurrentfirmwareandsoftware.,UsetheFinderonaMac(thathasbeenupdatedtoCatalinaornewer)torestore,sync,andbackupaniPhone.,PressandquicklyreleasetheVolumeDownbutton...。參考影片的文章的如下: