I need some help (error) downloading/installing lollipop on my Tab S 10.5

[mxrider821]

I rooted my tablet awhile back and did all types of things to it to make it that much better but now that lollipop is out I want to update. The problem is that every time i go to update it gives me an error message & says "The operating system on your device has been modified in an unauthorized way. Try downloading software updates using samsung kids on your PC, or visit a customer service center."

The question I have is how can i completely reset my tablet to factory files and settings? CAN YOU PLEASE PROVIDE STEP BY STEP INSTRUCTIONS. I know about hard reset and wipe cache during start up but I feel like theres more. Please help me out on this guys. thanks in advance

 

[D Android]

Download the appropiate firmware from sammobile.com and flash it with Odin.

 

[mxrider821]

Download the appropiate firmware from sammobile.com and flash it with Odin.

Thank you sir.. Do you have step by step instructions on how to do both of those things?

Posted via Android Central App

 

[D Android]

Instructions How to flash Stock ROM via ODIN with the New Interface and also on sammobile.com website.

 

[mxrider821]

Instructions How to flash Stock ROM via ODIN with the New Interface and also on sammobile.com website.

You're the man! One last question, I own a new macbook. Can I do everything on my mac?

Posted via Android Central App

 

[D Android]

That I don't know, I use PC but I can't remember seeing it anywhere that says you can't use mac.

 

[mxrider821]

Got everything done and it's working perfectly, thanks for the help

Posted via Android Central App