Hello, I am a totally new user of abinit, and I cannot manage to run it: I am using a MacBook (Intel Core 2 Duo) with OS 10.5.8. I downloaded v6.4.3 of Abinit yesterday, and started the lesson 1 of the tutorial http://www.abinit.org/documentation/helpfiles/for-v6.4/tutorial/lesson_1.html I went thro...