You Do Need power plug adapter while traveling from Macau to Western Sahara.

Here is Why You Need An Adapter

The outlet and plug type used in Western Sahara are C and E and in Macau is G. This is how they look like.

Macau

In Macau, outlets of type G are in use.

Type G

Western Sahara

In Western Sahara, outlets of type C and E are in use.

Type C

Type E