Mac loaded driver script

#!/bin/bash
 
# MacOS Catalina (10.15):  Darwin 19.x.0
kernelver=`uname -a | awk '{print $3}'`
kernelver1=$(echo $kernelver | cut -d "." -f 1)
kernelver2=$(echo $kernelver | cut -d "." -f 2)
kernelver=$kernelver1.$kernelver2
echo "Check Mac OS kernel version: Darwin kernel version : $kernelver"


if [ $(echo "$kernelver >= 19.0" |bc) -eq 1 ]; then
    echo "  Mac OS version >= 10.15.x"
   
    kernelpath=`sudo pwd`
    if [ "$kernelpath" != "/Library/Extensions" ]; then
        echo "  In path $kernelpath"
        if [ -d "/Library/Extensions/ACS6x.kext" ]; then
            # 目錄 存在
            echo "  Directory /Library/Extensions/ACS6x.kext exists."
           
            echo "  Remove ACS6x.kext driver"
            sudo rm -rf /Library/Extensions/ACS6x.kext
           
            echo "  Copy driver to system"
            sudo cp -R ACS6x.kext /Library/Extensions/
            sudo cd /Library/Extensions/
           
        else
            # 目錄 不存在
            echo "  Directory /Library/Extensions/ACS6x.kext does not exists."
           
            echo "  Copy driver to system"
            sudo cp -R ACS6x.kext /Library/Extensions/
            sudo cd /Library/Extensions/
        fi
       
    else
        if [! -d "/Library/Extensions/ACS6x.kext" ]; then
            # 目錄 不存在
            echo "  Error: Directory /Library/Extensions/ACS6x.kext does not exists."
            exit 0
        fi
       
    fi
   
    echo "  Change ACS6x.kext driver owner"
    sudo chmod -R 755 ACS6x.kext
    sudo chown -R root:wheel ACS6x.kext
    sudo xattr -d -r ACS6x.kext
   
    driverstat=`sudo kextstat|grep Accusys`
    if [ "$driverstat" != "" ]; then
        echo "  Kextunload ACS6x.kext driver"
        sudo kextunload ACS6x.kext
        sudo kextunload ACS6x.kext
    fi
   
    echo "  Clear system cache"
    sudo kextcache -clear-staging
   
    echo "  Loaded ACS6x.kext driver"
    sudo kextload ACS6x.kext
   
    echo "  Rebiuld system cache"
    #sudo kextcache -system-prelinked-kernel
    #sudo kextcache -system-caches
    sudo kextcache -i /

else
    echo "Mac OS version < 10.15.x"
   
    driverstat=`sudo kextstat|grep Accusys`
    if [ "$driverstat" != "" ]; then
        echo "  Kextunload ACS6x.kext driver"
        sudo kextunload ACS6x.kext
        sudo kextunload ACS6x.kext
    fi
   
    echo "Kextload ACS6x.kext driver"
    sudo chmod -R 755 ACS6x.kext
    sudo chown -R root:wheel ACS6x.kext
    sudo kextload ACS6x.kext
   
    if [ $(echo "$kernelver >= 14.0" |bc) -eq 1 ]; then
        sudo touch /Library/Extensions
    else
        sudo touch /System/Library/Extensions
    fi
   
fi