Are you getting could not validate source Mac error while accessing your Mac machine? Well, then don't worry. It can be easily fixed. However, the problem of could not validate source Mac usually appears when someone tries to make a bootable flash drive using .ISO files. Apart from that, the problem also emerges when someone tries to restore the external storage media or thumb drive using Disk Utility. As a result, users are unable to access the saved USB files. So, it requires to take some urgent action to fix could not validate source Mac, otherwise it may cause a severe hinder inside the Mac machine. Now, the questions arise how to fix the problem and to get access to damage Mac files? Well, in order to fix could not validate source Mac error users should make use of Disk utility and also tries to recreate the ISO file. But, doing so will only get rid of annoying error message. However, fails to retrieve damage files, so in such case an effective and reliable Mac data recovery software come to your help.