So basically i want to install a different copy of osx on my laptop and still have all my files and software stored on a ssd if i want to switch back to my old files. Except i don't know where the system is physically stored is it in the ssd or is the storage separate and sottered to the motherboard. I do not want to replace my software i want two interchangeable ssd's.
P.S. the model is A1465 if that helps
MacBook Air, mac osx serria
The OS and all files are stored on a bootable drive. In your case it's an SSD in the form of a board that can theoretically be removed/replaced if needed.
Not quite sure what you want to do, but it is possible to have a complete working operating system and storage on an external USB drive, which can physically be a hard drive or an SSD. This is called an external boot volume. You can use it almost exactly like you would your internal drive, although it tends to be slower.
Why do you want to have another copy of macOS on your MBA?
You are of course aware that the oldest version of macOS that MBA can run is Mountain Lion.
In order to install two operating systems, you are either going to have partition the SSD or install a second for for the additional version of macOS.
Your computer has an SSD. The OS is stored on it.
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Location of Software
