Trouble with Mac/Windows roundtrip
I sent the accountant the 2010 Quickbooks for Mac data in Windows format at the end of 2010 tax year. They have just recently sent me back the updated data but I was unable to read it.
I sent the accountant the 2010 Quickbooks for Mac data in Windows format at the end of 2010 tax year. They have just recently sent me back the updated data but I was unable to read it.

Was there an error message when atempting to restore from backup?
No. The file names on the drive were the 'faded background, unable to open' type. However, I did figure this out. I actually clicked on the file>restore, and the files lit up, meaning I could open them. The accountant's office had sent me the entire file, rather than the 'accountant's file', which, had I opened it and restored the file, I would have wiped out all the transactions I had entered since I sent the data to the accountant. That would have been a huge error. I am waiting for the accountant's office to send me the proper files. Thanks for trying to help. Have a great day!
There is no accountant's file copy for Mac. You are not supposed to enter any data in your file while your accountant has it, so yes, if you open the file and restore it on top of your working file, it will wipe out the changes you have made
I usually recommend that people ask their tax accountant for a list of changes they made to the file and enter them manually. Or if the thought of journal entires makes you squeamish, arrange for a remote session and have your accountant do them.
Sorry, but there is an accountant's file in the accountant's version of Quickbooks. We, the regular business people don't have that. I have just finished an extensive talk with Intuit Quickbooks for Mac people and have found that they can download the accountant's changes to your file data and send it back to you with only the changes (probably an IIF file) and you can update only the changes to your file - but ONLY if you are using Quickbooks for WINDOWS. The Mac version does not have this possibility. I believe that is a huge flaw and weakness in Quickbooks for Mac because you cannot make any changes, such as any transactions, to the data files while your information is at the accountants. So, I guess you send everything to the accountant, shut down your business and go on vacation until the accountant is ready to send back your information, if you are a MAC user. Wow!! I cannot believe in 2012 the programming of this highly touted software is so inept. I will enter the info from the accountant manually, which I am definitely capable of doing. It just seems a bit surreal to be forced to do this in 2012. I have programmed mainframe computers since 1962 when we programmed 1 instruction for 1 instruction and remember all the freedoms we had to do anything we wanted. To have the Intuit person say they cannot do such a task as download accountants' changes to a Mac file format when they can do it for a Windows format makes absolutely no sense to me.. And, Intuit touts the ability to 'round trip' betweem QB Mac and the Windows accountant - false advertizing in my opinion, because that only works if you don't touch your company data while the accountant is working on your files.