Unity3d project failed to build for iOS macos Catalina (cocoapods problem)

so i'm stuck trying to build a unity3d project with Unity 2017.4.39f1 for iOS with MacOS Catalina and Xcode 11.4. The error shown in Unity is as bellow:

For info i have cocoapods and git are installed in my system normally. Here is the error that unity is showing when trying to build for iOS:

 Error running CocoaPods. Please ensure you have at least version 1.0.0.  You can install CocoaPods with the Ruby gem package manager:
  > sudo gem install -n /usr/local/bin cocoapods
  > pod setup
 
 'pod --version' returned status: 1
 output: 
 
 /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/executable.rb:118:in `block in which!': [31m[!] Unable to locate the executable `git`[0m (Pod::Informative)
     from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/executable.rb:117:in `tap'
     from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/executable.rb:117:in `which!'
     from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/executable.rb:143:in `capture_command'
     from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/command.rb:116:in `git_version'
     from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/command.rb:130:in `verify_minimum_git_version!'
     from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/command.rb:49:in `run'
     from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/bin/pod:55:in `<top (required)>'
     from /usr/local/bin/pod:23:in `load'
     from /usr/local/bin/pod:23:in `<main>'
 
 UnityEngine.Debug:LogError(Object)
 Google.Logger:Log(String, LogLevel)
 Google.IOSResolver:Log(String, Boolean, LogLevel)
 Google.IOSResolver:OnPostProcessInstallPods(BuildTarget, String)
 UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)