The CheckRa1n jailbreak tool needs to be installed on the macOS system. After making the jailbreak U disk with the help of 3uTools, you can use CheckRa1n to jailbreak your iPhone on a Windows computer ...
What iDevice are you using? iPad Mini 2 (WiFi) On what version of iOS is it? 12.5.5 What version of checkra1n are you using? 0.12.4 What is your host system (OS version? Hackintosh? VM? etc.)?