How to Fix 'Error 42' When 'Tansee iPhone Message Transfer for Mac' is Loading Data? Download this guide as a PDF file 1 Please try deleting or removing all backups located here: ~/Library/Application Support/MobileSync/Backup 2 Download and install the latest version of Tansee iPhone Message Transfer for Mac from here. 3 If the issue persists, attempt the following steps: Step1 Backup your iPhone using Finder on your Mac. Step2 Run Tansee without connecting your iPhone. Under Tansee's 'iTunes backup' tab, click on your iPhone.