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My xperia z1 is stuck in a boot loop and i dont know what to do cuz it wont go into safe mode cuz any time i boot it up it freezes then restarts and does the same so cane you please help me thank you. 
Turn off the phone > charge it > run PCC > support zone > repair > remove both SIM and SD cards from your phone > Repair the phone
Bridge (for Mac)
Alternatives on How to backup Xperias
Performing a system repair using PC Companion - This will factory reset your phone and erase all data
Switch off your phone and unplug from Pc (Hold volume up and power for around 10 seconds)
Start PC Companion and select Support zone then Update my phone/tablet then in Blue Repair my phone/tablet and follow the on screen instructions - When prompted connect your phone still switched off holding volume down or back button - This should start the repair or reformat process
If you are using Windows 8/8.1 or a 64bit operating system then adjust the settings for PC Companion and run in compatibility mode and chose Windows 7 or XP