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problems with Catalina Upgrade from Mojave on Lat 7480


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Hello everyone.

For reasons other than that, I had to reinstall mojave 10.14 on my latitude 7480.
Most devices work, except the audio, I was checking and it must be from ACL256 ID> 21, that worked before reinstalling.

I would like to know the steps to upgrade to Catalina or why not, to Big Sur, but I don't know how.

Otherwise I stay with Mojave, hoping to have your help to activate the audio.



I would like to know if I can update from olarila Catalina or big sur or should I do it from Apple?

Where can I get the necessary and updated steps for my 7480?

Thank you


Edited by moshau
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