xCode에서 자동 생성되는 헤더 커스텀

~/Library/Developer/Xcode/UserData/IDETemplateMacros.plist
에 파일 추가

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>FILEHEADER</key>
	<string>
//  ___FILENAME___
//  ___PACKAGENAME___
//
//  Created by ___FULLUSERNAME___ on ___DATE___
//  Copyright © ___YEAR___ ___ORGANIZATIONNAME___. All rights reserved.
//</string>
</dict>
</plist>

위 내용이 기본으로 아래 문서 참고하여 커스텀하기
Text macros reference – Xcode Help (apple.com)

아래 위치마다 적용되는 범위가 다름
Project user data: .xcodeproj/xcuserdata/[username].xcuserdatad/IDETemplateMacros.plist
Project shared data: .xcodeproj/xcshareddata/IDETemplateMacros.plist
Workspace user data: .xcworkspace/xcuserdata/[username].xcuserdatad/IDETemplateMacros.plist
Workspace shared data: .xcworkspace/xcshareddata/IDETemplateMacros.plist
User Xcode data: ~/Library/Developer/Xcode/UserData/IDETemplateMacros.plist