QB Issue Resolution:

You have to download the mac app, click it and enter username and password.

My opinion, (I have a Mac as well), the app sucks.  I log in via chrome.

Resolution for Issue 'Hey, I just bought quick books online, but i dont understand how i can connect it to the mac app? any help please?' available: Yes (Solved).
Source: Intuit Community forum.

Hey, I just bought quick books online, but i dont understand how i can connect it to the mac app? any help please?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for app sucks
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Error Recovery for app sucks [Canada]
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