What is JIT?

JIT, or Just in Time, is a technique used by Dolphin to emulate the GameCube and Wii's CPU at fast speeds. Without JIT, Dolphin would run at unplayably slow frame rates. However, on non-jailbroken iOS devices, an app cannot use JIT by default.

How to Enable JIT on DolphiniOS

There are two main options for JIT enablers. Devices running iOS 17 or higher currently require a Mac to enable JIT. Windows is not supported at this time.

• AltJIT: AltJIT is automatically attempted when starting a game if DolphiniOS is installed using AltStore. However, your iPhone or iPad must be connected to the same Wi-Fi network as the PC or Mac that AltServer is installed on for AltJIT to work. For more information, see the AltJIT guide.
• Xcode (macOS only): Xcode is a free application available from the Mac App Store. To enable JIT, go to "Debug" in the menu bar, select "Attach to Process", and then click on the "DolphiniOS" entry in the list.