Hi,
Before you try anything fancy, make sure both machines can ping each other.
On the SGI:
/usr/etc/ping -c 5
on the Mac:
ping -c 5
Both should report 0.0% packet loss.
If this is not working, stop right here. You need to setup your network!
Otherwise, if the pings worked…
To enable the OS X NFS server without the Terminal, try NFS Manager.
http://www.bresink.de/osx/NFSManager.html
Once you have enabled a shared directory on your Mac using NFSManager (check the help that came with it), on your SGI make sure autofs or automount is turned on (using chkconfig).
To access your Mac, in irix:
cd /hosts//
That’s it.
Good luck.
— Xavier