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Can't open in Mac

If this template helps then use it. If not then just delete and start from scratch.

OS : Macbook, version 10.11.16
PsychoPy version 3
Standard Standalone

What are you trying to achieve?:
Trying to open the download from Releases · psychopy/psychopy · GitHub, but it stuck on “verifying”

I had the same issue (on mac os 10.10.5) but it worked after I uninstalled Psychopy 2 and all associated files (which I identified using a program called AppCleaner), and then tried again to install Psychopy 3. The verifying-process still took a while but it eventually opened.

1 Like

Hi, thank you. I used the Appcleaner to remove the and related files. Re-installed the app and wait fro a long time, then it works.

I’ve been having this issue on my Mac (El Capitan) for a while. I stumbled into this post and it fixed the “verifying” issue for me.


xattr -d /Applications/

If you are sure that you downloaded the app installer from the official/verified source and that it has not been tempered with, you can skip the verification process altogether by removing the extended file attribute that causes FileVault to attempt to verify the application. Do this by executing the following command from terminal:

xattr -d /Applications/

The is the name of the application you are changing the extended attributes on. In this case, .

The xattr command allows you to view and change extended file attributes. The -d flag indicates you are deleting the attribute which is set on the application package. Any file with the extended attribute of is verified by FileVault. This attribute is typically automatically set on downloaded files and files extracted from a tar or zip archive.