Our website provides a free download of Workbench 18.104.22.168 for Mac. This free Mac application was originally designed by Citrix Systems Inc.
From the developer:
Workbench is a blackboard application written solely for Mac OS X.
You may want to check out more software for Mac, such as Genome Workbench, CLC Main Workbench or CLC Genomics Workbench, which might be related to Workbench.