Try this and see if it helps.
Resetting permissions on the Diablo III folder
1. Select the Diablo III folder
2. Press Command + I
3. In the Info box, go to the Sharing & Permissions section and click on the lock and unlock it, entering your admin password when prompted.
4. Make sure you have Read & Write permissions
5. Click on the Burst icon (cog wheel) and select Apply to enclosed items
08/02/2012 03:10 AMPosted by RogerdeflNow open a terminal and type: (#indicates first line of terminal)
#sudo su (Warning whit this you become root)
#ps -fea | grep Agent (You see something like this)
cd '/Applications/Diablo III'
sudo chown -R myuser:staff .
08/02/2012 10:00 AMPosted by RogerdeflDON'T DO A KILLALL -9 Agent, list of proceses related Agent in my MacBook:
Threats of violence. We take these seriously and will alert the proper authorities.
Posts containing personal information about other players. This includes physical addresses, e-mail addresses, phone numbers, and inappropriate photos and/or videos.
Harassing or discriminatory language. This will not be tolerated.