MySql5 install on SnowLeopard, problems starting

Ryan Schmidt ryandesign at
Sun Oct 10 19:44:48 PDT 2010

On Oct 10, 2010, at 21:34, Scott Haneda wrote:

> On Oct 10, 2010, at 7:09 PM, Ryan Schmidt <ryandesign at> wrote:
>> Note that on Leopard and later, the user is technically _mysql (not mysql).
> Is there a technote on this? Is this an Apple convention or do other nix's share the underscore uname duplication? Maybe there is a non Apple doc on this behavior?
> All my testing and searching has always shown the two username forms to be interchangeable. (As long as the alias exists in the record, which I think happens automatically.)
> I have always wondered the official guidelines on the username format as well as official documentation on the uses of the underscore in a username or group. 

I don't know if there's any Apple documentation about this convention.

My understanding is that Apple (and presumably other vendors) switched to prefixing system users and groups with an underscore to differentiate them from users and groups created by the user.

My understanding was also that the non-underscored alias exists and is equivalent, however I did receive a bug report about lighttpd (and/or mysql?) before I had special code in the ports to use the "correct" username on each OS.

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