You should have received an email with a download link as well as your product and license numbers (which you’ll need to register). ¬†You can download at the link below (be sure to change product to Mac).

http://support.quickbooks.intuit.com/Support/ProductUpdates.aspx?lid=UpdateDownloads

Resolution for 'change product issue: 'Just purchased Quickbooks 2016. Where is the download for Mac’s?' available: Yes.

The change product 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 change product issue yourself by looking for a resolution described in the article. If it is a complex change product issue or you are unable to solve the issue, you may contact us by clicking here or by using other change product support options.

For more information about resolving issues related to change product in Quickbooks/QBO or to get support for the issue 'Just purchased Quickbooks 2016. Where is the download for Mac’s?', click the link below: