my phone's display is damaged and i need to transfer all the data from the phone but it has a screen lock, what can be done?

my phone's display is damaged and there's a crack on it's screen too. before getting the phone repaired i need to transfer all the data from the phone to my mac but i am facing a problem while doing this. to transfer the data the phone needs to be unlocked and my phone is locked via a pattern lock. i tried randomly the pattern on the phone's screen but it dint work out. i need an alternative that would help me unlock the phone so that i may transfer all the data. Please help.