Hi Vishnu,
Yes, there is a SAPGUI for Java that works on MacOS. You can download it from http://service.sap.com/swdc -> Support Packages and Patches -> Browse our Download Catalog -> SAP Frontend Components -> SAP GUI FOR JAVA -> SAP GUI FOR JAVA 7.30 -> Mac OS -> PlatinGUI730MacOSX_9-20008876.JAR.
Regards,
Matt
