Inaccessible SharedPrecompiledHeaders from PlaybackEngines causes iOS build to fail along with UnauthorizedAccessException on MacOS

Steps to Reproduce:
1. Create a new project
2. Switch to iOS platform from Build Settings
3. File > Build Settings > Build

Actual Result:
Build fails with UnauthorizedAccessException due to Inaccessible SharedPrecompiledHeaders from PlaybackEngines

Expected Result:
A project is built for iOS platform without any issues.

WorkAround:
1. Go to the Editor's installed location.
Unity /Applications/Unity/PlaybackEngines/iOSSupport/Trampoline/SharedPrecompiledHeaders
2. Right Click on "SharedPrecompiledHeaders" > Get Info > Sharing and Permissions
3. Change permission of "everyone" to "Read & Write"
4. Now project can be built for iOS platform

Reproducible on:
2019.1.0a12

Not Reproducible On:
2019.1.0a11, 2018.3.0f2

Environment:
Occurs Only On Mac

Note:
1. SharedPrecompiledHeaders folder from PlaybackEngines is introduced in 2019.1.0a12
2. Refer attached "Error Details" text file and attached screenshot.