can you write full code?

Sure, I can provide a full code snippet to download multiple packages based on your system checks. However, since we don't have a real package manager function like `install_package`, I'll demonstrate a simplified version using Python's `subprocess` module for illustration purposes. Let's assume `pip` is used for package installation:

import subprocess
import os

def check_system():
    # Replace with actual system checking logic
    macos_version = "12.0" if "macOS" in os.uname().system else None
    cpu_info = "Intel" if "Intel" in os.popen('sysctl -n machdep.cpu.brand_string').read() else None
    return macos_version, cpu_info

def install_package(package_name):
    try:
        command = f'sudo pip install {package_name}'
        if not macos_version or not cpu_info:  # If system details aren't available, skip installation
            print(f"System details not determined. Skipping {package_name} installation.")
        else:
            subprocess.run(command, shell=True, check=True)
            print(f"{package_name} installed successfully.")
    except Exception as e:
        print(f"Failed to install {package_name}: {e}")

def install_multiple_packages(package_list):
    macos_version, cpu_info = check_system()
    if macos_version and cpu_info:
        for package in package_list:
            install_package(package)
    else:
        print("Cannot determine system details. No packages will be installed.")

# Example usage
packages_to_install = ["numpy", "matplotlib"]
install_multiple_packages(packages_to_install)

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