Opening a legacy Max patch

Molly Jones's icon

I've been tasked with recreating a Max 4.2 patch in Max 9. When I try to open the patch in Max 8 or 9, the console reads "can't open, bad header." I'm using an Intel Mac running Sonoma 14.7.7, and I'm unable to install Max versions 4-6 without downgrading my operating system. Wondering if anyone has advice on how I can see what's in this patch.

ghost from the past's icon

max 8 can read max 4.2 files

maybe file is corrupt.

eLud's icon

you could open in it in a text editor and compare it to another max patch to see what's wrong maybe