Are you searching solution for Mac sync error? Well, Mac error 20 is a common App Store error which is mostly occurs when the App store is updated manually by the users. It is quite a critical issue and needed to be resolved soon in order to avoid any further destruction. In such situation whenever users try to run Mac application error 20 appears on the users indicating that App Store can not be used on your system. In case if you are also facing the same problem then read the bellow given information in order to get rid of this Mac sync error completely and access your files again.
However in order to fix this issue you will need to uninstall the updates carefully. However in case if the problem still exist then you will have to format your hard drive in order to get rid of this very error. After that you can restore all your formatted data on Mac using third party Mac Data Recovery Software. It safely recover all lost, deleted, formatted or corrupted data on Mac. Hence it is advisable to use Mac Data Recovery Software in order to get back all your formatted data on Mac after Mac sync error in a very safe and hassle free manner.