What are alternatives to a large drop down select list?

I am adding a single selection drop-down containing a list of all countries (around 200+ items).

In Windows it works fine as it displays 10-15 countries at a time and the scroll bar shows up. On the Mac, the drop-down shows all the items at once. The users have to scroll down through all items to look for their desired item.

I am not using a text-field as it may require spell check.

What are alternatives to a large drop-down select list that will work similarly across computers?