Running Catalina Need to Dual Boot to Yosemite
I'm currently running the latest version of Catalina. I recently bought a piece of equipment that the software is last compatible with Yosemite. I know you can use dual boot but I'm having a hard time figuring it all out. can someone give me directions on how to do this? I know the drive system is different. HFS+ for Yosemite and APFS for Catalina I think. Not sure how to create the bootable disk for Yosemite and not loose my stuff on my MacBook Pro. Erasing my HD is not an option. I have a 2TB external Drive that I can format and boot from or I have room on my internal 1TB drive to make a drive for Yosemite too.
I need to get this figured out before the weekend is done. I have work to complete.
MacBook Pro 13″, macOS 10.15