So, you’ve just fired up your Mac and you are greeted by the error message no executable com.apple.rpmuxd. What is it? What should you do? Read on because we will share with you everything you need to know about com.apple.rpmuxd.
What is Com.apple.rpmuxd?
Rpmuxd, also called the Remote Package Multiplexer Daemon, is a diagnostic component of the Xcode IDE that is used to collect network packet traces of any attached iOS device during the debugging process.
Because Apple seems to have not yet updated the service for Catalina and other later macOS versions, many Mac users are having problems with it. As a result, they are getting the no executable com.apple.rpmuxd error message.
How to Troubleshoot the No Executable Com.apple.rpmuxd Error Message
What should you do if you see the no executable com.apple.rpmuxd error message? Well, you’ve come to the right place. Below, we’ll teach you how to troubleshoot and deal with any package tracking problems on your Mac.
1. Use the Remote Virtual Interface (RVI)
When you launch Xcode for the first time, the Remove Virtual Interface or RVI tool is automatically installed. This tool is quite handy in fixing any problems associated with Xcode. If Terminal can’t find this tool, here’s what you should do:
- Be sure that you are running the latest version of Xcode.
- Be sure that /usr/bin is in your shell search path.
Now, if the RVI tool won’t load and the bootstrap_look_up(): 1102 error pops up, be sure that the com.apple.rpmuxd daemon is installed and properly loaded.
This command should give you an idea whether the com.apple.rpmuxd daemon is installed: sudo launchctl list com.apple.rpmuxd
If the daemon is properly installed, you should see this output:
$ sudo launchctl list com.apple.rpmuxd
“Label” = “com.apple.rpmuxd”;
Otherwise, you’ll see this:
$ sudo launchctl list com.apple.rpmuxd
Could not find service “com.apple.rpmuxd” in domain for system
Don’t worry if you are seeing the latter message. You can always force load it by using the command below:
sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.rpmuxd.plist
2. Use a Network Debugging Tool and Understand How It Deals with Traffic
A network debugging tool plays a critical role in dealing with traffic to and from the local machine. It is also responsible for coming up with solutions that work best for a given situation, such as when dealing with the .com.apple.rpmuxd error. If you are not sure about how a network debugging tool works and its limitations, it is best to check the documentation that comes with it.
Some of the most popular network debugging tools for macOS are Ping, Tracert, IPConfig, Netstat, Wireshark, Nmap, and TCPDump.
For example, if you are using the TCPDump data-network packet analyzer program, it may sometimes flag the TCP checksum of packets sent by your local machine as bad due to TCP checksum offloading.
Although it is not a fatal problem, if it annoys you, you may choose to turn off this check by passing the K option to the tool.
You can do a lot of things with your choice of network debugging tool. Again, just check the manual.
3. Reduce the Amount of Dropped Packets by Increasing the Packet Recording Buffer Size
Do you always record all the byte size of every packet sent? If yes, then it is possible that you overrun the packet recording buffer of your kernel. If this happens, your packet tracing tool, such as the Remote Package Multiplexer Daemon, will report error messages like the no executable com.apple.rpmuxd.
Here is an example of a summary of how many packets have been recorded, dropped, and filtered.
$ sudo tcpdump -i en0 -w trace.pcap
tcpdump: listening on en0, link-type EN10MB (Ethernet), capture size 65535 bytes
94 packets captured
177 packets received by filter
0 packets dropped by kernel
If the dropped value is non-zero, you may choose to increase the packet recording buffer size. Do this by passing the –B option. To find out how you can do this, check your tool’s manual.
4. Use the Promiscuous Mode Properly
A packet tracing tool should be run on the actual machine that is involved in the communication that you’re checking. For instance, if you are seeing the com.apple.rpmuxd error on your Mac, your choice of packet tracing tool should be launched on your Mac as well. This way, you can easily troubleshoot the problem.
But then again, in some cases, this is not practical. In times like this, you need to run the tool on a completely different machine.
Should you wish to do so, make sure you are aware of the following challenges:
- The target interface should support promiscuous mode, which is the ability to record packets that are not bound for that interface. Modern Ethernet interfaces already support this mode. The same with newer WiFi interfaces. However, they’re not always useful due to restrictions set in a certain network topology.
- The network topology should allow the interface to see the packets. Back then, you can ensure this by connecting all your machines to one hub. But hubs are already a thing of the past. DSL gateways may even claim to have embedded four-port hubs, but they’re only referring to switches.
- Switches aren’t designed to forward traffic to all ports. If you are using a simple switch, there is no way you can override it. For promiscuous mode to be useful, you have to use an advanced switch that supports port mirroring or the ability to forward local traffic to a specific port.
- If you are planning to use promiscuous mode on a WiFi network, know that WiFi access points act like switches. This means standard traffic can only be seen by the stations involved, as well as the access point. Only low-levels of WiFi packet tracing can take advantage of the promiscuous mode.
5. Optimize Your Mac for Better Performance
Sometimes, issues like the com.apple.rpmuxd error arise due to junk and unnecessary files that have accumulated on your Mac. To prevent these issues from happening, make it a habit to optimize your Mac for better performance.
To do this, you may need to use a third-party Mac repair tool that scans your Mac for all sorts of junk, including old iOS updates, broken downloads, diagnostic reports, browser and app cache, and unneeded log files. Download a Mac repair tool of your choice and install it. And then, run regular scans to ensure your Mac is free of any junk files that mess with your system processes.
Should you encounter the com.apple.rpmuxd error in the future, you know what to do. Just load up this article and run through our recommended fixes until you find one for you. But if you are not that tech-savvy, we suggest that you seek help from professionals. Take your Mac to the nearest Apple Repair Center and have it checked by authorized personnel.
Do you have any other questions about the com.apple.rpmuxd error? Ask us in the comments!