Is there any solution regarding to PyQt library doesn't work in Mac OS Big Sur?

Question

I've done some project using PyQt library for my class assignmnet. And I need to check my application working before I submit it.

Today, 3 hours ago I updated my Mac book OS to Big Sur. And I found out that PyQt library doesn't work. It doesn't show any GUI.

Are there someone know how to fix it?

Same issue on Big Sur with Python 3.9 and PyQt 5.15.1, GUI does not show up. — Ford1892, Nov 13 '20 at 13:57

score 20 · Answer 1 · answered Nov 16 '20 at 10:25

20

Adding os.environ['QT_MAC_WANTS_LAYER'] = '1' fixes the issue on PyQT 5.15.1 (credits)

answered Nov 16 '20 at 10:25

PyQt5 5.15.2 was released on Nov 24 and it supposedly integrates this fix. Can anyone running macOS Big Sur confirm that PyQt 5.15.2 works out of the box? – cbrnr Nov 26 '20 at 16:10
1

@cbrnr yes, PyQt 5.15.2 works fine without setting environment variable – Stanislav Tikhomirov Nov 27 '20 at 17:15

score 6 · Answer 2 · answered Nov 14 '20 at 09:50

6

Rolling back to PyQt5==5.13.0 fixed the issue for me! you should uninstall PyQt5 and then install it using pip install PyQt5==5.13.0

answered Nov 14 '20 at 09:50

ucktrk

score 0 · Answer 3 · answered Nov 13 '20 at 10:24

0

It could be related to this.

If it is, then disconnecting from the internet would fix it. As would redirecting ocsp.apple.com to 0.0.0.0 in /etc/hosts.

answered Nov 13 '20 at 10:24

Roland Smith

score 0 · Answer 4 · edited Dec 16 '20 at 22:44

0

Related to this, after upgrading to BigSur my app stopped launching its window...I am using the official Qt supported binding PySide2/shiboken2

Upgrading from PySide2 5.12 to 5.15 fixed the issue.

Steps:

edited Dec 16 '20 at 22:44

dericke

answered Nov 30 '20 at 16:36

Edwin Fernandez

4 Answers4