我正在尝试在Mac OS上安装flutter。
但是随后我运行（颤振医生）命令，我在这里得到了这个信息：
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.7.8+hotfix.3, on Mac OS X 10.14.5 18F132, locale en-GB)
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.1)
[✓] Xcode - develop for iOS and macOS (Xcode 10.2.1)
[!] iOS tools - develop for iOS devices
✗ libimobiledevice and ideviceinstaller are not installed. To install with Brew, run:
brew update
brew install --HEAD usbmuxd
brew link usbmuxd
brew install --HEAD libimobiledevice
brew install ideviceinstaller
[✓] Android Studio (version 3.4)
[!] Connected device
! No devices available
! Doctor found issues in 2 categories.
我的问题是如何安装libimobiledevice和ideviceinstaller。然后我试图安装它们，只是说一次又一次地重新安装它们。……
有人可以帮我吗？