Notes for MacOS users with Catalina

[Paula]

On macOS Catalina, the first time you try to run alphaMELTS it may fail due to new security settings. Go to System Preferences -> Security & Privacy and select "Allow anyway".

In macOS Catalina the default shell is zsh, but if you upgraded from Mojave then you may still have bash. One way to check is to open the Terminal program and type 'echo $0' (that is 'zero', not uppercase 'o') at the command line. If it says '-zsh' then you will need to type 'bash -l' and press enter (that is lowercase 'L', not 'one') each time you open Terminal, before starting the run_alphamelts.command script. See the documentation for more details.