I have used Macs for over 20 years and in all that time I have never had a more frustrating experience than trying to install and use this software. It refuses to install and when this is reported to their Technical Support people, they are worse than useless. Their attitude seems to be 'Oh No! How could anyone dare to criticise our wonderful product!' and they take it personally if you say anything negative about it - such as 'I am having a problem.' I have decided to ditch this completely after 8 frustrating weeks of trying to get it to install. AVOID BUYING THIS. Chronos you should be thoroughly ashamed. Disgraceful.