Can DVD-Cloner for Mac combine two DVD-9 discs onto one DVD±R DL?

Yes. Please follow the steps.

Step 1: Run DVD-Cloner for Mac and select the "Combine two DVDs to one DVD±R DL" copy mode.

Step 2: Insert the source DVD disc, select the target DVD burner and then click on "NEXT".

Step 3: Select a menu template. A simple menu can be added for the convenience for playback. You can select a template and define the volume names. If you do not know how to do it, simply click on the "NEXT" button to skip and the default menu will be applied.

Step 4: Affirm the copy configuration and then click on the "START" button.

Step 5: It starts reading the first disc.

After the reading of the first DVD is completed, please insert the second DVD disc and it will start reading.

Step 6: After the reading is completed, the drive will eject automatically and please insert a blank DVD±R DL and then it will start burning.

Step 7: Completed!