dvd region code

Install a disk that is for that region. Note that the region code can only be changed 5 times. After that it is locked with the last code that was played.

Ciao.

Get another DVD drive. Make certain you use the correct region code disks in it or see if you can get a 'region free' DVD drive.

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Region encoding is the mechanism that enables motion picture studios to control the worldwide release of their movies. It is required by the DVD Forum (http://www.dvdforum.org/forum.shtml) in all commercial hardware DVD players. Every DVD-Video disc contains one byte of data representing a region code, which limits where the disc can be played.

https://support.apple.com/en-gb/HT201705

Once you have set the region in DVD Player five times it cannot be changed. However see this also:

https://support.apple.com/en-us/HT201705

Instead, use VLC to view videos from different regions:

http://www.videolan.org/vlc/download-macosx.html