PopClip Troubleshooting

Problem Possible Solution
PopClip fails in a specific app Check the list of incompatible apps. Some software is not compatible with PopClip. See: PopClip Known Issues.
Check whether you added the app to the Excluded Apps list. You can access the Excluded Apps list in PopClip preferences.
Quit and restart both apps. Try quitting and restarting the affected app. If that fails, try quitting and restarting PopClip.
Now try everything in "PopClip doesn't work at all" below.
PopClip doesn't work at all Check PopClip is On. Click on the PopClip menu bar icon and ensure that PopClip is turned on.

Check your keyboard shortcuts. PopClip needs the keyboard shortcuts for Cut, Copy and Paste to be the defaults: ⌘X, ⌘C and ⌘V. If you have custom shortcuts (in System Preferences → Keyboard → Shortcuts → App Shortcuts), PopClip will not work properly.

Reinstall PopClip. Quit and delete PopClip by dragging to the Trash, then install the latest version.

If you bought PopClip from the Mac App Store, go to the App Store and sign in with your Apple ID. In the Purchases tab, install PopClip again.

If you bought PopClip directly from Pilotmoon Software, download the latest version from PopClip Downloads.

Restart your Mac. This classic solution really works sometimes. Crossing your fingers is optional.

Enable Accessibility access. You may see this message when you click the PopClip menu bar icon:

Use System Preferences to let PopClip access the Accessibly API. See: Enable Accessibility Access for PopClip
PopClip does not appear in the list to enable Accessibilty Access Reboot you Mac, and PopClip should then appear in the list.
PopClip has locked up / using 100% CPU

Quit PopClip using Activity Monitor. Using Activity Monitor, you can force quit the app. If this happens a lot, please report it. Taking a sample using Activity Monitor's "Sample Process" will be really handy too.

Not all the extension(s) are not appearing

Extensions only appear if they are applicable to the selected text. See: PopClip FAQ.

An extension is not working

Try downloading the latest version of the extension from PopClip Extensions.

In Firefox: "A copy of Firefox is already open. Only one copy of Firefox can be open at a time." This happens when Firefox has downloaded an update in the background and needs to install it. All you need to do is quit Firefox and restart it.
I bought PopClip on the Mac App Store, but now it has gone back to trial mode and wants me to buy again! You have downloaded the website version. You should install the Mac App Store version instead. Quit PopClip and delete it, then then sign in to the Mac App Store and re-download it there.
I bought PopClip on the Mac App Store. I want to reinstall it, but the Mac App Store does not show it as having been purchased. You probably need to sign in to the App Store first, or you may need to unhide your purchase. See: Mac App Store Troubleshooting.