QB Issue Resolution:
We are aware of an emerging issue impacting QuickBooks Online users that are unable to log into the Mac App after upgrading to OS X (10.11) El Capitan. When these users attempt to log in they get the error message “We encountered a problem trying to sign in. Please try again.”
If you are experiencing this behavior, let us know and please follow this article for updates.
We know how important it is to be able to access your books and our engineers are working to resolve the problem. While they do so, we would advise you to access your QuickBooks Online company via any supported Web browser.
Resolution for Issue 'My Mac is on OS X El Capitan and when I attempt to access QuickBooks Online via the Mac app I see this: “We encountered an error trying to sign in. Please try again.”' available: Yes (Solved).
Source: Intuit Community forum.
My Mac is on OS X El Capitan and when I attempt to access QuickBooks Online via the Mac app I see this: “We encountered an error trying to sign in. Please try again.”: 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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