QB Issue Resolution:

QuickBooks Mac 2014 should work fine on 10.9.5. I had a conversation with someone else (or maybe it was you in a different post) and the problem turned out to be having Voice Over on in Apple System Preferences. If you have that on try turning it off.

Resolution for Issue 'I bought QB14 last month-upgraded to 10.9.5 OSX-now, QB won’t open.' available: Yes (Solved).
Source: Intuit Community forum.

I bought QB14 last month-upgraded to 10.9.5 OSX-now, QB won’t open.: 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.

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