Thanks for the prompt replies. Gabrielle ~ I have tried deleting the plist and restarting my computer, to no avail. What is the associated lock file? I tried firefox, no dice. Using safari.

Tried using Terminal, just got this message: users-macbook-pro:~ user$ unzip /Users/user/Downloads/Instructors%20 '14.xlsx Archive: /Users/user/Downloads/Instructors%20'14.xlsx inflating: xl/worksheets/sheet1.xml inflating: xl/sharedStrings.xml inflating: xl/styles.xml inflating: xl/workbook.xml inflating: xl/_rels/workbook.xml.rels inflating: _rels/.rels inflating: [Content_Types].xml 3. Already tried Unarchiver. Macfixer ~ I changed the extension to.zip, it just opened several folders and docs like when i tried Unarchiver. I can open zip files into word from Google Docs, but not spreadsheet docs.? You need to be using Office 2011 for Mac for best real-world compatibility with any current Mac OS (certainly 10.7 and later) and best compatibility with any current Windows version(s) of Office. Office v X is so ancient that it should be discarded completely. It requires Rosetta in order to run on any Intel Mac, which means you can't be using anything newer than 10.6.

If you're using anything prior to 10.6 you should emphatically not be as it is lacking important security-related updates and fixes, can't run any current Java, can't run any current browser - not any current Safari nor Firefox nor Chrome. Currently, if you buy Office '2014' or a 365 Subscription, you get Office 2011 for Mac - the version numbers don't line up across PC/Mac, never have:-/ (blame Microsoft and/or the Mac Business Unit division of Microsoft).

Mac OS X 10.6.8 is no longer getting security updates. So yes it will 'work' but I'd suggest the latest Firefox as your main browser, or Google Chrome - but I suggest real caution and care until Google fixes the gaping hole of malvertisers using plugins as an an exploit: so far just in Windows but it's still a concern as a vector for untrustworthy, unchecked and un-verifiable code getting onto a system. Apart from other legitimate privacy concerns vs. At least Mozilla does screen Firefox plugins so far.

Excel users generally encounter an error when trying to open or edit an Excel file in Office 2003, 2007, 2010, 2013 or 2016. The error message displays and indicates it as file corruption or incorrect Excel file format as below: 'Excel cannot open the file 'filename.xlsx' because the file format for the file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.' This article will introduce you the effective solutions to resolve.xlsx error, and get your MS Excel data back right here now. Causes: This error message is encountered in the following scenarios: • The file is not compatible with the Excel-version • The file has become corrupt or damaged Resolutions: Try the below mentioned resolutions to fix this error message and regain access to the Excel worksheet. Change the default file format to save Excel workbooks: MS Excel saves Excel workbooks as XLSX or XLS file by default.

Excel 2003 and earlier version save files as XLS, whereas Excel 2007 and later versions like the Excel 2010, Excel 2013, and Excel 2016 save files in XLSX file format. You can change the respective Excel version's default file format to any other file format that MS Excel supports.

To do so, execute the following steps: • In Excel 2007; click the ‘Microsoft Office’ button, and then ‘Excel Options’. In Excel 2016, Excel 2013, and Excel 2010: click File-> Options tab • Select Export option • Select Change File Type option • Change the file extension and click Save As Recover Unsaved Workbook: • Go to File and select Info option • Under Manage Versions, select ‘Recover Unsaved Workbooks’ option • If MS Excel has unsaved files then, it will list them. You can Open and save it. Unsaved files default location C: Users dazy.parker AppData Local Microsoft Office UnsavedFiles Use 'Open and Repair' feature of MS Excel: The ‘Open and Repair’ is a feature in MS Excel to repair damaged Excel file. To use it, execute the following steps: • Open MS Excel Application • Go to File and Select Open option • Select the corrupt file and choose Open and Repair option • Click on Repair to start repairing Note - If Excel repair process was not successful at the last time you used ‘Open and Repair’ feature, repeat the Steps (i) to (v). Next click ‘Extract Data’ button to extract the values and formulae from Excel file. Excel Repair Software: If none of the above mentioned resolutions fix the “Excel cannot open the file '(filename)'.xlsx” error, then Excel repair software is recommended to resolve the Excel error.