Please open the Disc Utility program via ~/Applications/Utilities/Disk Utility, click the Burn button.
Select the Leawo created ISO file using the Disk Utility on your Mac and see if it is OK. It may also be caused by disc incompatible issue, please try another brand of the blank disc to burn.
This FAQ is about: Blu-ray Copy for Mac, Blu-ray Creator for Mac, Frequently Asked Questions