Problem with one-signal for iOS

Hi I have a problem when I try to prepare iOS for android I had no problem, please could you help me


Ionic CLI : 5.2.8 (/usr/local/lib/node_modules/ionic)
Ionic Framework : @ionic/angular 4.9.0
@angular-devkit/build-angular : 0.13.9
@angular-devkit/schematics : 7.2.4
@angular/cli : 7.3.9
@ionic/angular-toolkit : 1.4.1


Cordova CLI : 9.0.0 (cordova-lib@9.0.1)
Cordova Platforms : none
Cordova Plugins : no whitelisted plugins (0 plugins total)


cordova-res : 0.6.0 (update available: 0.8.1)
native-run : 0.2.8 (update available: 0.2.9)


ios-sim : 8.0.2
NodeJS : v10.15.3 (/usr/local/bin/node)
npm : 6.11.3
OS : macOS High Sierra
Xcode : Xcode 10.1 Build version 10B61

This is the log when i try to prepare iOS

Installing “onesignal-cordova-plugin” for ios
“framework” tag with type “podspec” is deprecated and will be removed. Please use the “podspec” tag.
Failed to install ‘onesignal-cordova-plugin’: undefined
CordovaError: Promise rejected with non-error: ‘/Library/Ruby/Gems/2.3.0/gems/claide-1.0.3/lib/claide/command.rb:439:in help!\': \u001b[31m[!] You cannot run CocoaPods as root.\u001b[39m (CLAide::Help)\n\n\u001b[4mUsage:\u001b[24m\n\n $ \u001b[32mpod\u001b[39m \u001b[32mCOMMAND\u001b[39m\n\n CocoaPods, the Cocoa library package manager.\n\n\u001b[4mCommands:\u001b[24m\n\n \u001b[32m+ cache\u001b[39m Manipulate the CocoaPods cache\n \u001b[32m+ env\u001b[39m Display pod environment\n \u001b[32m+ init\u001b[39m Generate a Podfile for the current directory\n \u001b[32m+ install\u001b[39m Install project dependencies according to versions from a\n Podfile.lock\n \u001b[32m+ ipc\u001b[39m Inter-process communication\n \u001b[32m+ lib\u001b[39m Develop pods\n \u001b[32m+ list\u001b[39m List pods\n \u001b[32m+ outdated\u001b[39m Show outdated project dependencies\n \u001b[32m+ repo\u001b[39m Manage spec-repositories\n \u001b[32m+ setup\u001b[39m Setup the CocoaPods environment\n \u001b[32m+ spec\u001b[39m Manage pod specs\n \u001b[32m+ update\u001b[39m Update outdated project dependencies and create new Podfile.lock\n\n\u001b[4mOptions:\u001b[24m\n\n \u001b[34m--silent\u001b[39m Show nothing\n \u001b[34m--version\u001b[39m Show the version of the tool\n \u001b[34m--verbose\u001b[39m Show more debugging information\n \u001b[34m--no-ansi\u001b[39m Show output without ANSI codes\n \u001b[34m--help\u001b[39m Show help banner of specified command\n\tfrom /Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.4/lib/cocoapods/command.rb:47:in run’\n\tfrom /Library/Ruby/Gems/2.3.0/gems/cocoapods-1.8.4/bin/pod:55:in <top (required)>\'\n\tfrom /usr/local/bin/pod:22:in load’\n\tfrom /usr/local/bin/pod:22:in `’\n’
at cli.catch.err (/usr/local/lib/node_modules/cordova/bin/cordova:29:15)
at process._tickCallback (internal/process/next_tick.js:68:7)
[ERROR] An error occurred while running subprocess cordova.

    cordova platform add ios --save exited with exit code 1.

    Re-running this command with the --verbose flag may provide more

you got any solution regarding this issue ?