There are a few things I'm finding Archicad 10 very slow at compared to 9 and Copy is one of them. I thought perhaps it was just my machine or files, but 10 is now being rolled out through the office and other people are saying the same thing.
It is so slow to copy it regularly brings up that hated OS X symbol 'The Rainbow Pizza' for a second or so. If I Alt-Tab to a different application before Archicad finishes copying to the clipboard it appears to cancels the copy process (at least I when I paste I get the old clipboard contents).
[Edit: Removed a question about Add-Ons ... just discovered the problem is happening on fresh AC installs with no Add-ons yet]
cheers,
Owen Sharp
Design Technology Manager
fjmt | francis-jones morehen thorp
iMac 27" i7 2.93Ghz | 32GB RAM | OS 10.10 | Since AC5