Ο Masculine, η Feminine and το neutral as the kids το παιδια, borrowed FOREIGN WORDS, supermarket in Greek can be το Σουπερ-μαρκετ etc for other foreign words in Greek. and (το) is used in everything ending in (ι)- το ζουζουνι, το βουβαλι Κ.Τ.Λ.. Here endeth a mini Greek lesson.
There are some words that ends in other letter exept -ι with word "το". For example the word " the height "="το ύψος". The word "το" gets before noon as "the" and before verb as "it". Attention!!! The word "το" translates only in English after verb. For example " I love it" = "το αγαπώ" :)
On a mac, hit the small American flag (or British flag, or whatever language your computer is currently set to as the default language) at the top of the screen, go to Open Keyboard Preferences, then add the Greek keyboard from there. Once you've added it, switching between the two is as simple as clicking the flag at the top of the screen. Hope this helps.
I agree on having a greek keyboard-it would be very useful! I find that you can think of what the letter in Greek looks like, check if you were correct and then just copy and paste the greek letter into the answer box. Don't use google translate though, because you might not always get the proper greek letter there. If you use the boxes that come up at the start as well, don't because that one is the one that mainly does it. If you want to be more accurate for any language, whether it be German, English, Greek, Spanish, I would always recommend the website that it has it on, just in case you don't get the correct translation. For example, in french honey (as in what bees make) is 'miel', but if you use the first two boxes that you see, there will be different words because it is a homophone, so the first on that you will probably see is 'mon cheri', meaning honey as in a pet name for a loved one. If you can't be bothered to find the more accurate on though, check the bottom of the translated box and it could say that there are more translations. Click on this and you can find the correct one, this comes in handy if you have a word that can be a verb (an action or doing word) or a noun (a person, place, thing or feeling-most commonly called an abstract noun if it isn't tangible or visible).