Reproduction steps:
1. Create a new project
2. Go Edit -> Project Settings -> Player
3. Switch Scripting Backend for Standalone to IL2CPP
4. Go File -> Build Settings
5. Enable "Create Xcode Project"
6. Press build, choose the build location and build the project
7. Open Xcode project generated
8. Try to deploy the project to a Mac device

Expected result: The project builds and launches successfully
Actual result: The build fails with "rm: /Users/<User><Xcodeproj path>/DerivedData/build/Build/Products/Debug//GameAssembly.map: No such file or directory" error

Reproducible with: 2019.4.13f1, 2019.4.16f1, 2020.1.9f1, 2020.1.17f1
Not reproducible with: 2019.4.12f1, 2020.1.8f1, 2020.2.0f1, 2021.1.0a1, 2021.1.0a9 (read note below)
Could not test with 2018.4.30f1, because the option to generate Xcode projects for Mac standalone is not available

Not reproducible with Mono

Notes:
1. On 2020.1.0f1, 2021.1.0a9 the application asks for access to files on Desktop (where the project is located), so that might have to do something with the fix
2. I was not able to find where the issue was fixed on the trunk (it doesn't seem it reproduced in any versions of 2020.2, 2021.1 streams so this might be backported)