This is the best and the cheapest app for files/folders hide and lock in Mac.
I have tried many many paid and free apps. This is the best. You can buy this app for 2.99$ in App store.
Very user friendly and very simple.
This app doesn't encrypt files with a password. Only hide and lock. Lock means, prevent modifications.
Please read full description before you buy it. You can buy this app directly from below link.
https://itunes.apple.com/lk/app/file-...
If you have any problem, please let me know. We can discuss and it'll help us all.
Thanks!