When you open a .CSV data file while using certain browsers it might open in your browser rather than saving as a .CSV. To correct this, please do the following:
- In Safari, with the .CSV file opened, click File > Save As
- At the bottom of the pop-up, click "Format:" and change this to "Page Source"
- Click Save
- View the file contents in Google Chrome
- Click File > Save As, select CSV file
Now you can open this file in Excel to explore your data.