Quit out of IDL if it is currently running. Numbers asks if you want to convert it to a newer version, just click OK. To enable the copying and pasting of text from a native Mac program to an IDL widget program do the following. The exported file will open and edit without a problem. Choose Archive > Export as… and then select Numbers ’09… file. numbers file back from the time machine / other backup if they won’t open or just open them on a 10.12 Mac. It’s not the preferences or the OS, it’s the files itself that are corrupted, even though the same files work fine on my 10.12 (!) they don’t on my Mac Pro 2008 with 10.11. The fix to copy and paste not working in Numbers for Mac 10.11 The problem persisted on a different account and even after a completely clean install of 10.11 El Capitan. I found that the same files work fine on 10.12 Sierra and it’s newer version of Numbers.
Suggested fixes on the internet didn’t help so I did some experiments myself. Other apps work fine. OSX 10.11.6 on iMac 20-inch early 2009 and a Mac Pro 2008. Other keyboard shortcuts such as cmd-x and cmd-z seem to work as expected.
Restoring it to a previous version still leaves the copy/paste functions inoperative. To open this file, restore it to a previous version.] [“file name” can’t be opened for some reason. Deleting the pboard preference didn’t work. These two files also often refuse to open: I had a copy and paste problem but only in two particular Numbers files.
