After working for years with the GroupWise client on a Mac, it started to have poor performance, like extremely slow in browsing, reading and writing e-mails.
Here's a short tip for tuning the Java Environment Settings for the GroupWise client:
browse to your Applications directory, goto GroupWise.app, goto show Contents, there will be a file in it called Info.plist (where you can also add startup options), edit the file and goto