By the way, new mac today, no time machine backup, restoration or anything to do with BOINC. So NO UPGRADE.

I get exactly this error:

"You currently are not authorized to manage the client.

To run BOINC as this user, please:
- reinstall BOINC answering "Yes" to the question about non-administrative users
or
- contact your administrator to add you to the 'boinc_master' user group.

I'm running Mac OS 10.8.2 on a mac mini.
The boinc version is 7.0.31

I have NO SPACES in my username or my /Users/username path (I manually changed it during install to be better compatible with linux)

Logs pasted below.

Mar 14 19:54:51 localhost Installer[523]: @(#)PROGRAM:Install PROJECT:Install-735
Mar 14 19:54:51 localhost Installer[523]: @(#)PROGRAM:Installer PROJECT:Installer-614
Mar 14 19:54:51 localhost Installer[523]: Hardware: Macmini6,2 @ 2.60 GHz (x 8), 16384 MB RAM
Mar 14 19:54:51 localhost Installer[523]: Running OS Build: Mac OS X 10.8.2 (12C3103)
Mar 14 19:54:51 localhost Installer[523]: Env: PATH=/usr/bin:/bin:/usr/sbin:/sbin
Mar 14 19:54:51 localhost Installer[523]: Env: TMPDIR=/var/folders/55/918rwgvd173g6w3pz914s8h40000gp/T/
Mar 14 19:54:51 localhost Installer[523]: Env: SHELL=/bin/bash
Mar 14 19:54:51 localhost Installer[523]: Env: HOME=/Users/removed
Mar 14 19:54:51 localhost Installer[523]: Env: USER=removed
Mar 14 19:54:51 localhost Installer[523]: Env: LOGNAME=removed
Mar 14 19:54:51 localhost Installer[523]: Env: SSH_AUTH_SOCK=/tmp/launch-cOgDio/Listeners
Mar 14 19:54:51 localhost Installer[523]: Env: Apple_Ubiquity_Message=/tmp/launch-EHYQRe/Apple_Ubiquity_Message
Mar 14 19:54:51 localhost Installer[523]: Env: Apple_PubSub_Socket_Render=/tmp/launch-TYqsCg/Render
Mar 14 19:54:51 localhost Installer[523]: Env: _=/usr/bin/open
Mar 14 19:54:51 localhost Installer[523]: Env: SHLVL=1
Mar 14 19:54:51 localhost Installer[523]: Env: PWD=/
Mar 14 19:54:51 localhost Installer[523]: Env: __CF_USER_TEXT_ENCODING=0x1F6:0:0
Mar 14 19:54:51 localhost Installer[523]: Env: COMMAND_MODE=unix2003
Mar 14 19:54:51 localhost Installer[523]: BOINC Manager Installation Log
Mar 14 19:54:51 localhost Installer[523]: Opened from: /Users/removed/Downloads/boinc_7.0.31_macOSX_i686/BOINC Installer.app/Contents/Resources/BOINC.pkg
Mar 14 19:54:51 localhost Installer[523]: Referenced component packages (1) trustLevel=100

Fix was easy. Add a group using the mac user manager under system preferences, click the + button, change the drop down box to group, add the group 'boinc_master' add yourself to that group (I am admin so you may also need to be that) uninstall BOINC. Reinstall BOINC. Reboot. All done.

It is interesting to note that again, the official installed did NOT PROMPT WHATSOEVER for admin privileges or mention anything about the boinc_master group.