Rarely, an operating system upgrade will change its security policy in a way that prevents magma from working as it should. Any known issues are listed here, together with workarounds.

OSX 10.11 (El Capitan)

Upgrading to El Capitan removes the link to magma from /usr/bin, with the result that typing magma into a terminal window will no longer find it. To fix this, create the file /etc/paths.d/Magma containing the single line

/Applications/Magma

After doing so, magma should once again be runnable by typing magma in a terminal window