Fiji status bar reads "initializing" (something or other) then nothing happens. Disabling SCIFIO in ImageJ2 preferences solves the problem.

Information about your version of Java:

  os.arch => x86_64
  os.name => Mac OS X
  os.version => 10.8.5
  java.version => 1.6.0_65
  java.vendor => Apple Inc.
  java.runtime.name => Java(TM) SE Runtime Environment
  java.runtime.version => 1.6.0_65-b14-462-11M4609
  java.vm.name => Java HotSpot(TM) 64-Bit Server VM
  java.vm.version => 20.65-b04-462
  java.vm.vendor => Apple Inc.
  java.vm.info => mixed mode
  java.awt.graphicsenv => apple.awt.CGraphicsEnvironment
  java.specification.name => Java Platform API Specification
  java.specification.version => 1.6
  sun.cpu.endian => little
  sun.desktop => null
  file.separator => /

The up-to-date check says: REMIND_LATER

Information relevant to JAVA_HOME related problems:

  JAVA_HOME is set to: null
  imagej.dir => /Applications/Fiji.app

Information about the version of each plugin:

Activated update sites:
ImageJ: http://update.imagej.net/ (last check:20140702194308)
Fiji: http://fiji.sc/update/ (last check:20140702124334)

Files not up-to-date:
  b157f068 (MODIFIED) 20140627145954 Contents/Info.plist
  aa018ffb (NOT_INSTALLED) 20131120122050 plugins/TrackMate_-2.1.1-SNAPSHOT.jar