sh OS X 10.10 Yosemite升级检查

Posted 2021-05-07

#!/bin/bash
# OS X 10.10 Yosemite Upgrade
#
# Prerequisites for this upgrade:
# (this computer already checked and passed)
# - OS X 10.6.8+ already installed
# - 2 GB or more of memory
# - 8 GB or more of available disk space
# - 64-bit CPU
# - Supported Mac hardware model

os_upgrade_version="OS X 10.10 Yosemite"

######################
# Check Operating System Version
######################
product_version=$(sw_vers -productVersion)
os_vers=$(echo $product_version | cut -d "." -f1)
os_vers_major=$(echo $product_version | cut -d "." -f2)
os_vers_minor=$(echo $product_version | cut -d "." -f3)
echo "Current OS:       ${os_vers}.${os_vers_major}.${os_vers_minor}"

if [ $os_vers==10 ] && [ ${os_vers_major} -ge 10 ]; then
    echo "Current Operating System is ${os_upgrade_version} or newer already. Quitting."
    exit 1
fi

case $os_vers_major in
    [7-9])
        echo "Current Operating System is eligible for an upgrade to ${os_upgrade_version}."
        ;;
    6)
        if [[ $os_vers_minor == 8 ]]; then
            echo "Current Operating System is eligible for an upgrade to ${os_upgrade_version}."
        else
            echo "Current Operating System is too old to upgrade to ${os_upgrade_version}."
            exit 1
        fi
        ;;
    *)
        echo "Unable to determine if your system is eligible for an upgrade to ${os_upgrade_version}"
        exit 1
        ;;
esac

# Check CPU Architecture
# Only 64-bit is Supported
hwcpu64bit=$(sysctl -n hw.cpu64bit_capable)
if [[ $hwcpu64bit ]]; then
        echo "64-bit processor detected."
else
        echo "64-bit processor not detected. Quitting."
        exit 1
fi

######################
# Check hardware model
######################
hwmodel=$(sysctl -n hw.model)
hwmodel_name=$(echo ${hwmodel} | sed 's/[[:digit:]].*//')
hwmodel_num=$(echo ${hwmodel} | sed 's/[^[:digit:]]*//' | cut -d, -f1)
hwmodel_rev=$(echo ${hwmodel} | sed 's/[^[:digit:]]*//' | cut -d, -f2)
hwmodel_pass=0

# iMac
# Macmini
# MacPro
# MacBook
# MacBookPro
# MacBookAir
# Xserve
# http://www.everymac.com/mac-answers/os-x-yosemite-faq/os-x-yosemite-compatible-macs-system-requirements.html

if [[ "${hwmodel_name}" == "iMac" ]]; then
    if [[ ${hwmodel_num} -ge 7 ]]; then
        hwmodel_pass=1
    fi
elif [[ "${hwmodel_name}" == "MacBook" ]]; then
    if [[ ${hwmodel_num} -ge 5 ]]; then
        hwmodel_pass=1
    fi
elif [[ "${hwmodel_name}" == "MacBookAir" ]]; then
    if [[ ${hwmodel_num} -ge 2 ]]; then
        hwmodel_pass=1
    fi
elif [[ "${hwmodel_name}" == "MacBookPro" ]]; then
    if [[ ${hwmodel_num} -ge 3 ]]; then
        hwmodel_pass=1
    fi
elif [[ "${hwmodel_name}" == "Macmini" ]]; then
    if [[ ${hwmodel_num} -ge 3 ]]; then
        hwmodel_pass=1
    fi
elif [[ "${hwmodel_name}" == "MacPro" ]]; then
    if [[ ${hwmodel_num} -ge 3 ]]; then
        hwmodel_pass=1
    fi
fi

if [[ ${hwmodel_pass} ]]; then
    echo "Model Identifier: ${hwmodel}"
else
    echo "This computer does not meet the hardware model requirements for ${os_upgrade_version}. Quitting."
    exit 1
fi

######################
# Check system specs
######################
# RAM
hwmemsize=$(sysctl -n hw.memsize)
# 1024**3 = GB
ramsize=$(expr $hwmemsize / $((1024**3)))

if [[ ${ramsize} -ge "2" ]]; then
    echo "System Memory:    ${ramsize} GB"
    hwmemsize_pass=1
else
    echo "Less than 2GB of RAM detected. Quitting."
    exit 1
fi

# Disk Space
diskutil_plist="$(mktemp -t "diskutil").plist"
diskutil info -plist / > ${diskutil_plist}
freespace=$(defaults read "${diskutil_plist}" FreeSpace)
rm "${diskutil_plist}"
# 1024**3 = GB
freespace=$(expr $freespace / $((1024**3)))

if [[ $freespace -ge "8" ]]; then
    echo "Free Space:       ${freespace} GB"
else
    echo "Less than 8GB of free disk space detected. Quitting."
    exit 1
fi

echo "This computer has passed all checks and is eligible for an upgrade to ${os_upgrade_version}."
exit 0