About running on M1 chip Make sure you are using BigSur 11.3 (11.2 did not work for me) Photoshop has been optimised to run on M1, but as Zii 6.0.9 does not and patches the software in an M1-incompatible way. Therefore you must run it using Rosetta: Right-click Application > Adobe Photoshop 2021 > Adobe Photoshop 2021.app, select 'get info' and tick 'open using rosetta'
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