We appreciate your posting your concern here in the Community space, @ovtnvw. Let us give you insights about reconciliation not being saved in your Quickbooks Desktop for Mac (QBDT).

To begin with, I'd like to let you know that we haven't received any similar reports of issues with reconciling in QBDT Mac, but we're here to help you get through this.

Since you are facing an issue where reconciliation is unsaved in QBDT for Mac, there could be various reasons for it. One common reason could be discrepancies in your QBDT account, such as incorrect opening or closing balances, or modified or deleted reconciled transactions. To avoid these discrepancies and be able to save your reconciliation, it is essential to ensure that your QBDT account is error-free.

Therefore, to avoid such discrepancies and successfully save your reconciliation progress, check if you have the correct reconciliation details. Since your progress didn't save, I recommend starting the reconciliation process again and double-checking that you have all the correct details to avoid future issues.

Moreover, you may also check this link as your future guide when handling issues during reconciling your account in QBDT: Fix issues when you're reconciling in QuickBooks Desktop.

Let me know if you have further questions about reconciling an account in QBDT. I'm always here to assist. Keep safe.