I tried to reformat my macbook, and now it just shows a sign of "forbidden" and I can't get back to the menu of reformatting o

[vpintoa92]

Panic attack, the computer won't work and I cant go back to the reformat menu

 

[hang-the-9]

You need to make a boot disk and recover the OS from there.

 

[vpintoa92]

You need to make a boot disk and recover the OS from there.

How do I make a boot disk?

 

[hang-the-9]

You need to make a boot disk and recover the OS from there.

How do I make a boot disk?

Lots of info out there, https/support.apple.com/en-us/HT202294

You may need to do a web search for your specific OS version