Steps to reproduce:

1.  Create a new HDRP project
2.  Create any Visual Effect Graph
3.  Open the VFX graph
4. Add a gradient node
5. Open gradient color options
6. Select any key in the gradient color bar
7. Try deleting the key with command+delete or context menu Edit >

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Actual results: 
Key can’t be deleted using Mac keyboard or context menu options

Expected results: 
The key is deleted using Mac keyboard or context menu

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Reproducible with versions: 
2023.2.0a7, 6000.60f1, 6000.2.8f1, 6000.3.0b6, 6000.4.0a3

Not reproducible with versions: 
2022.3.68f1, 2023.2.0a6

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Tested on (OS): 
MacOS Sequoia 15.7.1