Mac Wallet still being tested and should be done before long - keep an eye on the site for when that is complete. If you want to invest as a Mac user you can still do so simply enter N/A in the field when asked for your $CIF wallet address. As long as the email address you use is valid then $CIF team can communicate with you directly once the wallet for Mac is available and will send your $CIF there once the ICO is complete.