Data format

1. To format the "OS" column with comma-separated values, select the column and click on the "Split Column" button in the "Transform" tab.

2. In the "Split Column" dialog box, select "Custom" as the "Split type" and enter a comma "," as the delimiter.

3. This will split the "OS" column into multiple columns with the same name.

4. Finally, select all the new "OS" columns and click on the "Merge Columns" button in the "Transform" tab.

5. In the "Merge Columns" dialog box, select a comma "," as the delimiter and enter "OS" as the new column name.

6. Click "OK" to apply the changes.

This should give you the desired format.  Let me know if you might require further assistance.