Transfer data from 2015 os Monterey to OS X el capitain
Can I transfer a 2015 laptop os Monterey to a 2015 OS X el capitain?
MacBook Pro 15″, macOS 12.7
Can I transfer a 2015 laptop os Monterey to a 2015 OS X el capitain?
MacBook Pro 15″, macOS 12.7
You can wipe the drive and install a different OS, but there is no simple "transfer" mechanism.
Create a bootable installer for macOS - Apple Support
Be careful doing this, one small slip-up and your Mac can be rendered unusable. Read the article fully and then follow the procedure precisely.
Note Apple's warning at the very beginning.
Transfer data from 2015 os Monterey to OS X el capitain