today I opened my eclipse as usual but I wasn't able to do anything. All menus except the preferences are grayed out, disabled.
I'm on a Mac Mavericks Beta 6 & Eclipse Kepler
Do u have any hints for me? Restart of Eclipse or the complete mac didn't solve the problem
Did you by any chance install the Mavericks beta 6? This is a known issue, Apple messed up Java. The work around is to install the full JDK http://support.apple.com/kb/DL1572. Solved the problem for me.
Change eclipse startup jvm (Oracle jdk ) will fix this problem, i use oracle jdk 1.7.0_25 and all menu are ok now.
Add this line into Eclipse.ini -vm /Library/Java/JavaVirtualMachines/jdk1.7.0_25.jdk/Contents/Home/bin/java
Good luck
Installing this also solved the problem for me. http://support.apple.com/kb/DL1572.
来源：https://stackoverflow.com/questions/18383381/eclipse-menus-disabled-on-os-x-10-9-beta-6