<p>How can I open multiple Eclipse workspaces at the same time on the Mac?</p>

<p>On other platforms, I can just launch extra Eclipse instances, but the Mac will not let me open the same application twice. Is there a better way than keeping two copies of Eclipse?</p>

EDIT:
Milhous's answer
seems to be the officially supported way to do this as of 10.5. Earlier version of OS X and even 10.5 and up should still work using the following instructions though.
Open the
command line
(Terminal)
Navigate to your Eclipse installation folder, for instance:
```
cd /Applications/eclipse/
```
```
cd /Developer/Eclipse/Eclipse.app/Contents/MacOS/eclipse
```
```
cd /Applications/eclipse/Eclipse.app/Contents/MacOS/eclipse
```
```
cd /Users/<usernamehere>/eclipse/jee-neon/Eclipse.app/Contents/MacOS
```
Launch Eclipse:
```
./eclipse &
```
This last command will launch eclipse and immediately background the process.
Rinse and repeat to open as many unique instances of Eclipse as you want.
Warning
You might have to
change the Tomcat
server ports in order to run your project in
different/multiple Tomcat instances
, see
Tomcat Server Error - Port 8080 already in use