I have two hard disks on my new iMac:

- solid-state disk: 256Gb. Core operating system files and application installs.
- regular HD: 1Tb. User files and media.

I moved my user directory from /Users/adam on the SSD disk, where it was installed by default, to a new folder (/adam) on the secondary hard drive (/Volumes/Macintosh HD 2). This caused problems when I started doing Unix-ish things. Especially with Python. Python does NOT like spaces in your directory.

I soft-linked the original directory (/Users/adam) to the new directory (/Volumes/Macintosh HD 2/adam) using 

ln -s ~ /Users/adam

. I then (re)set my user directory in OS X to /Users/adam.  Still, some stuff “saw” the aliased directory /Volumes/Macintosh HD 2/adam.  In the end, I renamed my “Macintosh HD” directories – their factory-installed names – to “HD1″ and “HD2″. Problem solved, so far.

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