I've just bought Numbers and I'm trying to open some XLS files. They're in Excel '97 format, not encrypted, and with no password set. However, when I try to open them, I get this error message:
"The document is encrypted and can't be opened"
They open fine in openoffice. How do I open them in Numbers?
Best Answer
Sometimes a xls file don't have password to open it, but it has it to avoid modifying certain fields, you can validate that. Also, if you have access to a PC with Windows you can try to save your xls file in a newer format.
Another alternative is to use a program like parallels or VMware to install/emulate window on your Mac.