How to save changes in a CSV file using Mac Numbers? I have a .CSV file, it opens well in Numbers ~4, but when i do changes in that file (editing row color, etc) i can't correctly save it. If i try to save it as .numbers - when i open that .numbers file, it gives me blank rows, everything is empty.
Try to keep it as a .csv file.

While you have numbers open go to the menu bar and click on file > Export to > CSV...