I am currently using a iMac with the operating system of 10.10.5 and have ungraded to Audacity 2.1.2. Prior to upgrading I had no problems of copying songs to edit in new window. Now with 2.1.2 I am unable to copy beyond the window from left to right. I can copy from right to left. The copying process is confined to the window boundaries. This occurs also in a new window. Copying from right to left is no problem, but as I said I was able to copy from left to right prior to the upgrade. Any help in this area would be highly appreciated.