1. After installing Catalina, Xcode refuses to install. It downloads for a long time (slow downloads from Apple) and then refuses to install with no explanation. 'Unable to Download App' “Xcode” could not be installed. Please try again later.
2. Dash, Xcode 11 and macOS Catalina. In case you like living on the edge, Dash 4 seems to work great with the macOS Catalina beta. The Apple API Reference docset was updated to work with the latest docs from the Xcode 11 beta. To use the Xcode 11 beta docs, make sure xcode-select -p (in Terminal) points to the location where you.
3. I Installed Catalina macOS 10.15 however I'm unable to install the new Xcode 11.1 update. The download is successful and launchpad reports 'Installing' and then after some time I receve the message 'Unable to Download App. 'Xcode'could not be installed.

Edit 2: It seems to be downloading very slowly; perhaps Apple's download servers are overloaded from people updating to the latest iOS release. I've been trying to install Xcode 12.5 from the App Store, although each time, it stops downloading at exactly 388 MB. This persists when cancelling and restarting the download, and even across a reboot. Before we get right to how to install command line tools on macOS, let us look at what macOS Catalina is all about. Apple just made available a major release of its macOS codenamed macOS Catalina (version 10.15). MacOS Catalina is the sixteenth release of Apple’s desktop operating system for Macintosh computers.

In this micro tutorial I wanted to cover installing RVICTL after installing macOS 10.15 and Xcode 11. I installed Xcode 11 beta along with the command line tools and fired up the terminal thinking that RVICTL would be available from /usr/bin, but was surprised when I did not see it from the command line. I started to look all over my machine in the usual places but and was stumped. Finally, I found a solution and that is why I wanted to write this tutorial, to share with you that that solution in case you had seen the same problem.

Install Xcode 11 On Catalina

What is RVICTL? RVICTL stands for Remote Virtual Interface Tool, that can start and stop a remote packet capture instance for any set of attached mobile devices. RVICTL is very useful for taking a packet capture or monitoring traffic off of a specific interface on a mobile device.

UPDATE: (9-6-2019) As of macOS Catalina 10.15 Beta 7 and Xcode 11 Beta 7 installing the .pkg by hand may no longer be needed. I installed Xcode 11 Beta 7 on macOS 10.15 Beta 7 and rvictl was available in the Terminal.

Here is the solution. Go to Finder application and hit the Go menu option in the top navigation bar. Next, navigate down to Go To Folder.

Install Xcode 11 On Catalina Download

When the Go to the folder option pops up, add in this path: '/Applications/Xcode-beta.app/Contents/Resources/Packages' Remember if Xcode is not in beta to remove '-beta' from the path on Xocde. Hit go and you should see 4 packages.

Double click to run through the install process for MobileDeviceDevelopment.pkg and for MobileDevice.pkg.

How To Install Xcode On Catalina

Now from the terminal you should be able to run the rvictl command and see a response recognizing the tool!

Install Xcode 11 On Catalina Island

That's it! That is all there was to it. Now you are good to run a packet capture and analyze traffic from any of your Apple mobile devices. For more information on how to do so, see my article on packet captures here. Hope you enjoyed this micro tutorial, if you have any questions, comments, or concerns, please leave a comment and I will get back to you as soon as possible. Thanks!