Install Oasys in MacOS

1) Install the Oasys App in your system

Oasys1.3 (MacOS >= 11.0), running on python 3.8.10 (suggested)

Oasys1.2 (MacOS >= 10.14), running on python 3.7.3 (deprecated)

2) Fix the App attributes

After installing and running the application for the first time, a popup with the message: "Oasys1.3 is damaged and can't be opened. You should move it to the trash." could appear.

To fix the problem, a quick solution is to open a terminal (Applications-->Utilities-->Terminal):

and type the following command:

xattr -cr /Applications/Oasys1.3.app/

Then, you should be able to run the application normally.