You Do Need power plug adapter while traveling from Macau to Balearic Islands.

Here is Why You Need An Adapter

The outlet and plug type used in Balearic Islands are C and F and in Macau is G. This is how they look like.

Macau

In Macau, outlets of type G are in use.

Type G

Balearic Islands

In Balearic Islands, outlets of type C and F are in use.

Type C

Type F