virtualbox.org

cdboot: init
00:00:05.150946 cdboot: file size: 0004EE00
00:00:05.150957 cdboot: reading sectors: 0000009E
00:00:05.150967 cdboot: loading....................
00:00:05.150978 cdboot: done

after getting above critical error occurs

You posted in the "Windows Guests" about "OSX". Moving to "OSX guests".

Follow a "start the VM from cold-boot" / "observe error" / "shutdown the VM" cycle. With the VM shut down completely (not paused or saved), right-click on the VM in the VirtualBox Manager and select "Show Log". Save only the first "VBox.log", ZIP it and attach it to your response (see the "Upload attachment" tab below the reply form).