What steps did you follow to get your photos into Lightroom 6?
Not really a steps. Just uninstall Lr5, install Lr6 and drag the RAW files location to the new Lr6.
You should use the feature which upgrades your LR 5 catalog to LR 6
So, in LR 6, you need to use File->Open Catalog and point to your Lightroom 5 catalog
By the way, the method you used will guarantee you lose your edit history, and only the final edited position will be known to Lightroom. If you want to see before and after, you need the history. The way to maintain the history is to do what I said above.
I still do have the ircat from Lr5. What should I do now? The Lr5 ircat file is saved in a folder on my secondary drive. The new Lr6 ircat is in windows Pictures folder, where the old Lr5 ircat was before.
Should I delete the new Lr6 ircat before I open the Lr5 ircat?
It doesn't really matter what you do with the current LR6 catalog
in LR 6, you need to use File->Open Catalog and point to your Lightroom 5 catalog
It did work.
Thanks lot dj_paige!