yes, there is no problem cashing traveller cheques. You can do that at any bank or major supermarket, of which you will find a sufficient number. However, there is also a huge number of ATM's so that you can use your bank cash card, too. Basically, it will be less expensive using the cash card and it will allow you a higher flexibility.
Immer wieder gerne auf Mauritius und im Meer darunter ;-))