Oh, and Adobe never addresses issues quickly I mean, this thread was started in 2013 and I still run across the hotkey issue in Illustrator CC 2017. Worth a try, but not a high likelihood of giving an answer. Im having a similar issue with my keyboard not working at all when within Dreamweaver CC 2017 running on iMac OSX 10.12.6. For example, here are the Windows and Mac versions of the Copy shortcut: CMD + C to Copy on a Mac keyboard CTRL + C to Copy on a Windows keyboard While some keyboard shortcuts are the same (or very similar), often times Mac keyboard shortcuts are longer (requiring more keys). So, showing the contents will clear up the situation only if the contents are something that Finder recognizes but SketchUp can’t accept. For many kinds of proprietary contents (including cut/copy from SketchUp) the window is blank and says “Clipboard contents: unknown” in its bottom border. What you see depends on the type of the contents. Unfortunately, its ability to present them is pretty limited. This will open a window that tries to display the current contents. In the Notes app on your Mac, click a note in the notes list or double-click a note in gallery view.To copy and paste text, do any of the following: Copy all the text in a note: Click anywhere in the note text, choose Edit > Select All (or Command-A), then choose Edit > Copy (or Command-C). You can see the current contents of the clipboard via the Finder menu Edit->Show Clipboard. There are add-on applications that provide a multi-level history, but I’ll assume is not using any of them as he didn’t mention does copy/cut - paste work in other apps? Have you tried restarting the system (that clears and restarts the clipboard process).

There is no built-in command to clear the clipboard on Mac and the native clipboard holds only the most recent item, not a stack or history. Nor do not know how to clear the contents of the clipboard

I used an app for multiple clippings on a Mac, but I can not recall if that ever caused problems in SketchUp.

My copy and paste is not working mac