Step by step guide:
Step1:Before you continue this step guide, you should free download this MPA Joiner for mac, here, we supports free download for a trial, all Mac Users can experience it
Step2: From the screen, find "add files" button to import your MPA files, here, you can add more files at a time, besides, you also can delete them by your wish.
Step3:In the bottom of the screen, you can find"format" and "Output", here, you can choose your output format and output folder, if you want to get advanced settings, you also can click"Settings" to realize.
Step4:Tick before"Merge into one file" , when you tick it , it means you want to join your video files into one large MPA file.
Step5:Press"Convert" button to finish this joining work, and later, you can playback you joined videos with high quality.
Download MPA Video Joiner for Mac