If Microsoft Excel fails to recognize a file in the XLSX or XLS format, the data contained in the file could be corrupted. When you open a corrupted workbook in Excel, the program should ...

Fix Excel Sharing Violation error - Your changes could not be saved because of sharing violation or were saved to a temporary document.

Do you want to visit the Microsoft Web site for more information?" - Microsoft Office 2008 for Mac 12.2.1 Update (23.8 MB) - Open XML File Format Converter for Mac 1.1.1 (45.1 MB) ...

Taking XLSM File Precautions Before trying to open an XLSM file, Kaspersky warns that some macros in these files can be malicious, especially if you receive your spreadsheet through a random email.