NEED HELP ERASING HD beta 10.15.5

[Taz Mangus]

How do I do that

How do I do that ?

I thought you had done this previously when you were booted in Recovery mode.

How to start up from macOS Recovery - Apple Support

macOS Recovery is your computer’s built-in recovery system, with utilities to reinstall macOS, repair or erase your startup disk, restore from a Time Machine backup, and more. Follow the steps for your type of Mac.

support.apple.com

 

[DeltaMac]

Just curious - what kind of situation demanded that you erase the boot drive on a brand new Mac?
Pretty sure that you have to disable the security settings, and disable SIP when you need to do that.
I used to do a full erase as part of my setup routine on a new Mac, but not since the advent of the t2 chip.

 

[Gerry7]

The bottom case screws are P5 Pentalobe.

I notice some sites sell a P5 Pentalobe(1.2mm) and some sites sell P5 Pentalobe(1.5mm) and make no distiniction. What does the 1.2/1.5mm size refer to.

 

[DeltaMac]

There are two different pentalobe sizes used in Mac equipment.
The laptop bottom covers all use the P5, which can also use the size designation of 1.2mm.
The P6 pentalobe (1.5mm) is actually too large to fit the bottom cover screws.
Where is that used? 2009 MacBook Pro battery. It's the only Mac use, AFAIK.