Netmon Managment Tool For Mac
Is there a good bit of software on Mac OS X that I can use to monitor incoming and outgoing network activity? Nothing too geeky, I just want something simple to use.
SQL Server Management Studio / Data Tools / Visual Studio SQL Server has two built-in management and development, and since Version 2008 R2, you can use them to manage Windows Azure Databases. Visual Studio also lets you connect to and manage portions of Windows Azure as well as Windows Azure Databases. MacHow2 is devoted to helping you get the most of of your Mac. We're passionate about all things Mac whether it's helping users with software recommendations or solving technical problems. Spiceworks Network Monitor is simple to install and easy to set up. Quickly add devices to the dashboard and see data lightning fast. Check out other Spiceworks Tools. Launch a free, fully loaded help desk in minutes to manage whatever users throw your way. Wireshark is widely acknowledged as one of the best network monitor tools available. Distributions are available for OS X. If you prefer something more simplistic you can use iStatMenus to show incoming / outgoing network traffic speeds.
I'm on version 10.6 (Snow Leopard) if that helps.
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8 Answers
Wireshark is widely acknowledged as one of the best network monitor tools available. Distributions are available for OS X.
If you prefer something more simplistic you can use iStatMenus to show incoming / outgoing network traffic speeds.

For the person who doesn't want to install anything you can also use tcpdump in Terminal.
Josh KJosh KAlso check out nettop, a little command line gem that ships with Mac OS.
Also look at MenuMeters. I tried iStat Menus & MenuMeters and preferred MM. Not saying one is better; just that there are a couple of choices.
A working version of MenuMeters for El Capitan can be found here.
LittleSnitch! - 30$
It is mainly a software Firewall that may help you to prevent some apps to access the internet. It also has a nice menubar icon with live network usage. Mouseover on it and it displays which app is communicating with which server or ip address.
I have LittleSnitch and iStat Menus installed. Both are complementary.
ArkoArkoCommercial (16$) iStat Pro and iStat Menus (dashboard widget and menu bar item respectively) are great for monitoring everything from network activity to CPU temperatures.
And of course there's the network tab of Activity Monitor.
sorinNetwork Logger for Mac OS X from Group Mind does a great job of tracking network traffic, downtime (in real time, with timed log), and lots of easy-to-understand stuff. I'm not technical and all I really wanted was to track when my ISP connection went down, and for how long it stayed down. Mac's little Network Utility app would ping endlessly but wouldn't give me a chronological log. Network Logger did, and was easy for a novice to understand.
Cost me $5.99 from the App Store.
/System/Library/CoreServices/Network Diagnostics Simple green/red LEDs for various layers. I slide it over to the right side of the screen until just the lights show.
Canon Color Management Tool For Mac
I've just installed Net Monitor and Net Monitor Sidekick and so far I like them. Nothing you can't get with other tools, but a nice summary display. Each is $10 after a 30 day eval, so YMMV, but I thought I'd mention them.