A file can be unlocked by choosing “Get Info” from the Finder's file menu.

You can unlock a removable disk by finding the write protection tab and sliding it to the write position.























































































































































































This is most likely due to a memory problem, try increasing the app's memory partition.



This is most likely due to low memory conditions. 





You could try allocating more memory in the Get Info box.











Changes made to the file will be discarded if the file is not saved.