I have recently bought a new SSD for my macbook pro, and plans to put my old HDD in a caddy and place it on the optical drive slot.
In my old HDD is ParrotOS and some important files. I plan to install Catalina on the SSD
I tried installing linux and MacOS in the same drive in the past, but Failed miserably. This way, it will be at different drives, and different file formats, so it wont interfere with each other. I have slow internet and cant afford to download large files regularly.
What are the available resources to download to have smoother Boot Switching between the two OS?