Transactions appear to be unreconciled after converting file from Mac to Windows or vice versa. Also, the reconciliation window looks different.
This is a known issue that occurs due to the way reconciliation works in Mac vs. Windows. QuickBooks for Mac 2012 and previous years still use the "old" reconciliation module, whereas the Windows reconciliation module was changed as of QuickBooks 2002. In Windows, the opening balance is now the sum of all transactions that have been reconciled through the reconcile module. In QuickBooks for Mac, the opening balance is created by check marking the transaction in the register.
QuickBooks for Mac 2013 does support the round tripping of reconciliation data with QuickBooks for Windows.
To correct this, you can do a lump sum reconciliation so all unreconciled transactions will be cleared in one batch.
QuickBooks for Windows:
Correct issues with transactions that have become unreconciled:
Note: If balance is not zero, check the balance against actual bank statements. There is an option to accept the difference and enter an adjustment.
Resolve issue where the reconciliation window looks different:
QuickBooks for Mac:
Workaround for issue with transactions that have become unreconciled:
Note: If the difference is not zero, transactions have been manually cleared (by checking off) in the bank register.
Note: Reconcile window does not change in Mac.