Adobe 12001196 - Acrobat - Mac Manual page 23

Application Security Guide Section 3 Protected Mode
One option is to add custom policies to bypass protected mode restrictions.
Can plug-in developers write their own broker?
No, we do not currently provide the option for developers to write their own brokers, but we may do so for
future releases.
Do the Broker and the Sandbox processes share both the WindowStation and the Desktop?
Yes.
Section 3 Protected Mode Page 19