i have/want spectrecoin (xspec), Leviarcoin (xlc), Railblocks (XRB) , Cardano (ADA), Xtrabytes (XBY) , PosToken (POS), Shift (shift), Blockpool (BPL), Obsidian (ODN)
which of them is maybe not 100% legit? Thx.
I can't really say. From your list, I only know (and trust) XRB and ADA. But if the coin has an active community and an actually good project, it shouldn't be an issue (for most of the time). Just don't download the wallet for those random coins that are a complete copy from another with just a few different variables and a random developer.
Do you use various pc, or virtual machine ?
can you run a virtual machine on mac or better on windows pc?
Running a Virtual Machine is way easier than having the money/space/hardware to manage multiple desktops. So, that's what I suggest (and use).