“Time machine sparsebundle could not be accessed”, is one of the most common error message arises during up-gradation of Mac OS X from lower to its higher version. Actually Sparsebundle is a file where Mac backups are being stored for future use and once it become inaccessible then your entire backup will be lost. This creates severe data loss situation in front of Mac users. Apart from that, Time machine sparsebundle could not be accessed, error message comes with different codes such as error code 1, 13 etc. Not only during mac OS X update but this type of error message also comes when your last backup is not done properly and terminated abruptly due to power cut. If it happen then an exclamation Mark will appear on Time machine icon which shows there is some problem with your backup. After that if you try to access that then system will throw “Time machine sparsebundle could not be accessed” error on your computer screen unexpectedly. Due to this unwanted message you can not restore lost doc, pictures, audio, video and other files on Mac machine. Therefore it is advised to get best solution to overcome this awful data loss situation. In this concern Mac Data Recovery Software is the bets option which can easily restore deleted, lost or inaccessible files even after occurrence of error message saying “Time machine sparsebundle could not be accessed”.