I am having an issue with Lion OS X 10.7.5 on both my MacBook Pro and iMac.
When trying to copy an .rtf file from iMac to MacBook Pro, over the network, and vice versa, I get the message that "Finder wants to make changes. Type your password to allow this."
Below this message window is another window showing a swirling progress bar and states "Preparing to copy to "desktop" and the name of the file.rtf I am trying to copy to the target machine. Simultaneously the .rtf icon and name of the file appears on the target machine desktop (which is the destination for the file to be copied) but the .rtf icon is empty (zero bytes) and cannot be opened.
So I ignore this and continue. When I submit my password I am then met by a message stating that, "A newer item named "xxxxxxx.rtf" already exists in this location. Do you want to replace it with the older one you're moving?" and I am given the 3 choices of "Keep both files" or "Stop" or "Replace".
If I chose "Keep both files" then over 6000 copies of the .rtf file appeared on the desktop of the target machine and the only way I can stop the copies being reproduced is by turning off Airport. Clicking the "Stop copy" only leaves the message that it is "stopping", but it does not, and the progress bar continues swirling and producing an infinite number of copies on the target machine until I turn off Airport.
If I choose "Replace" I get the message "The operation can't be completed because an item with the name """" already exists." and gives me no choice but to click OK.
The .rtf icon and name of the file on the source machine contains 1453 bytes but on the target machine the .rtf icon looks different and contains zero bytes and cannot be opened. The same goes for all the over 6000 copies that had been produced on the target machine. It is as if the outer shell of the file is copied but not the content!
I also have a Macbook running OS X 10.6.8 and there is no issue between MacBook Pro and Macbook, and there is no issue between iMac and Macbook, ONLY between MacBook Pro and iMac when attempting to copy by dragging, or by copy and paste, over the same network (all 3 machines are within a few meters of each other).
I've tried Restarting and Restarting with PRAM, on both machines. Stopping and Starting Airport. Tried with .jpg files as well as the .rtf files. Repaired Permissions. All to no avail. I put the rtf file onto a USB drive and then I can transfer from machine to machine without any problem - it just refuses to do so over the network.
Anyone know of a solution to this?