Hardware acceleration on MacBook pro Early 2015 not working

Hello,

I recently installed Capture One Pro 22 on a quite old MacBook Pro Early 2015 (Intel Iris Graphics 6100), it is this one:

https://support.apple.com/kb/SP715?locale=en_US

In various discussion forums I read that the graphic card should at least support OpenCL 1.2 in order to be able to use hardware acceleration in Capture One. The Intel Iris 6100 supports as far as I know even OpenCL 2.0. However, hardware acceleration does not work on this device.

Any ideas appreciated!
Jens