Throughout Arc, you will come across sections that allow you to export data for you to work with on your own machine.
To facilitate this, Arc exports data in CSV (comma-separated value) format. We've chosen this format as it's a universal format that works on all machines, and also works with non-proprietary software for users who do not have access to Microsoft Excel (though Excel will read CSV files fine too). CSVs are also a common format that many other systems accept for importing data, so this helps to keep things consistent.
Opening CSV files with Excel on Mac
By default, Mac machines will open CSV files in Mac's own spreadsheet software; Numbers. This can be quite annoying when you have Excel installed. The following steps will correct this:
Right click your CSV file and click "Get Info" in the dropdown menu
2. In the Information window that pops up, find the "Open with" section. Select Microsoft Excel, or your desired spreadsheet software from the list. Click the "Change All..." button to apply this change to all CSV files by default.
3. Now, when you double-click a CSV file, it will open up in Excel, instead of Numbers. This will apply to all CSV files on your machine currently and in future.