How to change kernel settings, shared memory configuration?
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I'm trying to install PostgreSQL and I need to allow for more shared memory configuration. Following the PostgreSQL documentation here:

http://www.postgresql.org/docs/8.2/static/kernel-resources.html

I just need to find a file called `/etc/sysctl.conf`, but I'm having a hard time.

But I guess you could say I'm new with computers, and I have no idea how to locate this file on my Mac, and google isn't helping. Any and all help is appreciated.

