Don\'t worry; it\'s very common problem that usually appears in MAC OS. It is commonly known as spinning beach ball of death which makes your system unresponsive. The error normally appears when the OS unable to handle entire events happening in the system due to some internal causes or any other reasons. After the appearance of this spinning beach you are unable to access any program or files as they get freeze. I think that similar situation occurs with you. At times it also happens that you lose your important files and folders.

In order to get rid of this problem and recover your spreadsheet you have to use any third party software. In my opinion you can use MAC Data Recovery Software. It is effective software that safely retrieves lost, deleted, missing and inaccessible files. I have used this software and it is really trustworthy. It can easily and safely recover your lost files in just few clicks. So, you must try this reliable software to get back your Excel spreadsheet or any other files if you have lost.