I recently migrated my Quicken Classic for Windows data to Quicken Classic for Mac. Many of my transactions have the legacy investment income categories such as _IntInc and _DivInc. When I attempt to merge these legacy categories into the sub-categories of Investments using the "Merge Categories" button within the Categories window, I get an error message:
Cannot merge the selected categories. The “Investments:Dividend Income” category is used internally by Quicken and cannot be modified.
It appears that merging categories into the required categories is not possible? Is there a workaround?