Issue
On linux:
eclipse PathnameToWorkspace
works fine, and launches eclipse on the workspace.
I've never been able to figure out the MacOS moral equivalent, given the MacOS application tree structure.
I suspect this is not a hard problem.
Solution
./eclipse -data <workspace-path> (see also How do I run Eclipse in the Eclipse Wiki).
Answered By - Fabian Steeg
Answer Checked By - David Goodson (JavaFixing Volunteer)
