On a PC, if you copy a set of data from Excel on multiple rows or just from a text editor on multiple rows, and paste into the Table Creator node it correctly puts the data on the same number of multiple rows.
However try this on a Mac and it puts all the contents into one cell which is really frustrating. You therefore have to go and paste everything in line by line.
This works on my machine when I don’t do Cmd+V but right-click into the Table Creator and Paste via the context menu.
This, however, has been fixed recently and will be released with the next version of KNIME Analytics Platform. Hence, you hopefully won’t have to use the workaround much longer…