I bought a new computer (windows 8) and installed a new copy of LR6. Unfortunately I did not upgrade my catalog, so all the pictures I had already on the computer, all the pictures on my old computer, plus the 5-6 harddrives I have of photos using LR 4 (or 5) cannot be accessed. What do I do at this point so that I can access these pictures in LR 6 as opposed to go back to my old computer with LR4 or 5 on it.
You can still upgrade the catalog.
Here are the steps.
Go to the location where your catalog is present.
Right click on that catalog and choose open with -> Lightroom 6(Adobe Lightroom)
Now it will give you the option upgrade the catalog.