Note: You must be running iOS 9. This tutorial is for Windows-only, since the Pangu tool is a Windows executable. You can run a Windows virtual machine on your Mac if you wish to jailbreak iOS 9 on a Mac. This jailbreak should work for any iPhone, iPad, or iPod touch capable of running iOS 9. That includes the new iPhone 6s and iPhone 6s Plus.
Step 1: Backup your device and connect it to your computer via USB.
Step 2: Disable Find My iPhone via Settings → iCloud → Find My iPhone.
Step 3: Disable Passcode and Touch ID via Settings → Touch ID & Passcode.
Step 4: Enable Airplane mode via Control Center.
Step 5: Download the Pangu jailbreak tool for iOS 9 from Pangu website page and run it.
Step 6: Start the Pangu jailbreak by clicking the Start button and click Already Backup when prompted.
Step 7: Your iPhone will reboot and Pangu will ask you to put your iPhone back into Airplane mode. Once you do this, it will continue the jailbreak.
Step 8: After some time, the Pangu tool will request that you open the Pangu app on the iPhone’s Home screen.
Step 9: Once the Pangu app is run, it will ask to you to allow access to your Photo Library. Tap the accept button on the Pangu screen to continue.
Step 10: Tap the OK button on the “Pangu Would Like to Access Your Photos” pop-up box.
Step 11: Your iPhone will reboot again. Once you reboot, disable Airplane mode, and run the Cydia app.