本文由macos教程欄目為大家介紹macos brew cask安裝virtualbox遇到的問題，希望能夠幫助到有需要的小伙伴。
macos brew cask安裝VirtualBox遇到的問題
問題一：Cask ‘virtualbox’ is already installed.
如果不是通過Homebrew安裝的virtualbox，在使用brew cask install virtualbox安裝virtualbox的的時候，會提示：
Warning:?Cask?'virtualbox'?is?already?installed.
那么就需要重新安裝virtualbox，命令：
brew?cask?reinstall?virtualbox
如果還不巧，你的virtualbox剛好在運行中，又會提示：
Failed?to?unload?org.virtualbox.kext.VBoxDrv?-?(libkern/kext)?kext?is?in?use?or?retained?(cannot?unload).
那么，就需要網上拉日志，找到：
Warning!?Found?the?following?active?VirtualBox?processes:
這些是運行中的虛擬主機列表，其中第一列是它們的 ID，用kill命令關閉服務，如：
kill?234
然后再重新安裝：
brew?cask?reinstall?virtualbox
問題二：Error: Failure while executing;
安裝virtualbox的最后一步會要求輸入電腦的登陸密碼，不過在你輸入密碼后，可能還是會提示錯誤，這是因為權限的問題，主要信息如下：
~?brew?cask?reinstall?virtualbox ?==>?Caveats ?To?install?and/or?use?virtualbox?you?may?need?to?enable?its?kernel?extension?in: ???System?Preferences?→?Security?&?Privacy?→?General ... ?==>?Running?installer?for?virtualbox;?your?password?may?be?necessary. ?==>?Package?installers?may?write?to?any?location;?options?such?as?--appdir?are?ignored. ?installer:?Package?name?is?Oracle?VM?VirtualBox ?installer:?Installing?at?base?path?/ ?installer:?The?install?failed?(The?Installer?encountered?an?error?that?caused?the?installation?to?fail.?Contact?the?software?manufacturer?for?assistance.) ?==>?Purging?files?for?version?6.0.10,132072?of?Cask?virtualbox ?Error:?Failure?while?executing;?`/usr/bin/sudo?-E?--?env?LOGNAME=gary?USER=gary?USERNAME=gary?/usr/sbin/installer?-pkg?/usr/local/Caskroom/virtualbox/6.0.10,132072/VirtualBox.pkg?-target?/`?exited?with?1.?Here's?the?output: ?installer:?Package?name?is?Oracle?VM?VirtualBox ?installer:?Installing?at?base?path?/ ?installer:?The?install?failed?(The?Installer?encountered?an?error?that?caused?the?installation?to?fail.?Contact?the?software?manufacturer?for?assistance.) ?Follow?the?instructions?here: ???https://github.com/Homebrew/homebrew-cask#reporting-bugs ?/usr/local/Homebrew/Library/Homebrew/system_command.rb:111:in?`assert_success' ...
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