Created Downloading and installing xcode headless + scriptless (markdown)

Downloading-and-installing-xcode-headless---scriptless.md

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+A bit of a convoluted process but should allow you to download XCode without needing additional scripts and having to setup the appstore
+
+1. Go [here](https://stackoverflow.com/questions/10335747/how-to-download-xcode-dmg-or-xip-file) and select the xcode version appropriate for your version of mac
+I was using the pre-setup Catalina docker, so I chose [this version](https://developer.apple.com/services-account/download?path=/Developer_Tools/Xcode_12.4/Xcode_12.4.xip)
+2. Now if it asks you to sign in, do so and accept the terms and conditions
+3. Now click the download button and then:
+    - Either download the xip file onto your host OS and transfer via sFTP or other means
+    <br>
+    1. Alternatively, at this point the page should switch to buffering logo and remain stuck there. Use a cookie view (I used the chrome extension `EditThisCookie`) and copy the value for `ADCDownloadAuth`.<br>
+     2. On your guest machine make a file called `cookies.txt` and add the cookie in the form ```.apple.com      TRUE    /       FALSE   1679146596      ADCDownloadAuth [cookie value]```
+     3. I assume you have homebrew installed, download wget and use the command `wget --load-cookies cookies.txt [xip download link]` - ~10gb Xcode.xip should download
+
+4. Then simply a matter of configuration:
+
+`xip --expand [xcode.xip]`
+
+`sudo cp Xcode.app /Applications`
+
+`sudo rm /Library/DeveloperCommandLineTools && xcode-select -r`
+
+`sudo xcodebuild -license accept`
+
+`sudo xcodebuild -runFirstLaunch`