Update BootLoader on an Ender-5 PRO with processor ATMEGA 1284P

Hi,

I am an absolute beginner And printing things goes well.

Now i have also the Creality Sonic Pad and i would connecting this thing to my Ender.

In the installation description is mentioned that i have to update de de bootloader of the motherboard first because i have the ATMEGA 1284 P processor. I cannot find anything on the Creality website how to do this.

Can someone help me please?

I have a MacBook computer to work on.

Greetings from Belgium, Gent !

Stany