You have to convert from any supporting QBD Mac version (i.e 2019-2020) to QBO.
https:// quickbooks.grsm.io/US
https:// quickbooks.grsm.io/us-promo
If you are using QBD Mac 2014, it is possibly running on MacOS 10.9. You have to install the trial license of QBD 2019 on Mac 10.12 at least. Another option purchase a 3rd party conversion service.