You can export the calendar that you have in Wealthbox to your iMac Apple Calendar in a read-only format.
To do so, go into your Wealthbox account > Applications > iCal > "Settings". Here you will find a link which you may copy-and-paste into your iMac / Apple Calendar. Click here to find your calendar web address.
In iMac Calendar:
1. Select “New Calendar Subscription” under “File.”
2. Paste the link you copied from Wealthbox.
3. Click “Subscribe.”