You are quite frustrated because the Mac files not opening. You can easily view then on the finder application but when you click on them nothing happens and you can not access the contents of the file. This generally happens when the file is damaged or corrupted, there can be several reasons for that like the file was abruptly closed while editing, the transferring of the site was interrupted. The drive corruption can also lead to file corruption so you need to deal with the drive first for Mac files not opening problem. This can be done by using the disk utility and then copy of the corrupted file can be restored from the time machine backup. If you time machine is not helping then you can use the Mac data recovery software which will help you to scan the drive and then the show you the list in the preview. The user will be then allowed to choose the file for recovery. The software has intuitive user interface that is easy to use and it is effective too. You must download the software now as it can be used every time Mac files not opening situation occurs.