In order to get started download the Pinkcoin bootstrap below:
Open your Finder
In the top bar select Go:
In the dropdown window select Go to Folder (⇧⌘G):
A pop-up will show up in your finder view
Enter the following path:
You should now be in the Application Support folder.
In Application Support locate the pink2 folder and open it.
Open the Bootstrap.zip you downloaded in the beginning, you should see the following:
Select all the files in the Bootstrap folder and paste them in the pink2 folder, overwrite all if asked.
You can now open up your wallet and should be close to being done, when your wallet is completely synced you will see a green checkmark in the bottom right corner.
Now that your wallet is fully synced make a backup off your wallet.dat