You are going to have to get it into .ofx format. I was about to note that most all these backdoor convertors that convert unsupported formats run under windows. But, the first search hit was for a free online one:
How well it works-well you have to try. You also have to realize you are uploading transaction files to a third party. I would open the CSV in excel and see if there is any data you don't want viewed by others.