The Network Addon Mod, or NAM, is a modification for SimCity 4 Deluxe (or SimCity 4 with the Rush Hour Expansion pack), which adds a myriad of new transport network items, ranging from ground light rail, to fractional-angle roads, to roundabouts, and much more. It also includes bugfixes to Maxis items and a highly optimized set of traffic simulator plugins, improving pathfinding accuracy and performance.

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4 comments by TarkusSC4 on Jul 28th, 2014

The changes included in NAM 32.1 are specific to ensuring compatibility with the 2014 Aspyr re-release of the Mac OS X port of SimCity 4 Deluxe, on the Mac App Store and Steam, as well as the older disc version with the Universal Binary patch on Mac OS X Lion (10.7) or later.

  • Exemplar encoding has been fixed, effectively solving the crash-to-desktop (CTD) issues that have existed on the Mac port since Apple's removal of Rosetta in OS X Lion (10.7).
  • Adds transit network paths that were missing in the Aspyr release.
  • Includes an installer for the first time.

NAM 32.1 is a Mac-only release, and all the changes to the package are aimed at ensuring compatibility with the Aspyr port. No other features have been added, making a NAM 32.1 release unnecessary for Windows.

In order to open the NAM for Mac installer, you will need to acquire a file decompression tool capable of handling 7-zip (.7z) files, such as Keka or The UnArchiver. We have used 7-zip because of its use of LZMA compression, allowing the file to be hundreds of megabytes smaller. The package contains a "READ FIRST" .txt file that will further instruct you as to installation.

A few other items of note:

  • As the installer package is basically the Windows installer running in a Wineskin wrapper, it is unable to detect Java, and by default, cannot run the Controller Compiler. You will encounter a pop-up dialog box informing you of this while the files are installing. The installer is designed to install the full NAM Controller as a failsafe. Testing results have shown that the full controller has much less of a performance impact on the Aspyr port than on the Windows version, but if you would like to run the compiler, it is possible to do so manually. The "READ FIRST" document details this information.
  • The Aspyr re-release is known to have a quirk in which the number of files (not their size) contained in the Plugins folder can cause crashes to desktop. This issue is inexplicably triggered with a much lower number of files if the user is running the game while not connected to the internet. To avoid these crashes, we recommend that the user use a tool like the cross-platform JDatPacker in order to combine the NAM files. Further instructions are included in the "READ FIRST" document.

Special thanks to memo from the NAM Team for spearheading this compatibility effort, and to Jonathan, Sabretooth78, and TEG24601 for testing and feedback.

The team would like to thank the Mac userbase for their patience, and we hope you enjoy this new package.

Network Addon Mod - Version 32.1 (Mac Installer)

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Network Addon Mod - Version 32.1 (Mac Installer)

Network Addon Mod - Version 32.1 (Mac Installer)

Jul 28, 2014 Full Version 21 comments

The Network Addon Mod (NAM) combines all transportation network-related fixes, additions and new creations that have been released so far. It will add...

Network Addon Mod - Version 32

Network Addon Mod - Version 32

Jan 14, 2014 Full Version 42 comments

The Network Addon Mod (NAM) combines all transportation network-related fixes, additions and new creations that have been released so far. It will add...

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Guest Feb 6 2015, 1:25am says:

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TarkusSC4 Creator
TarkusSC4 Feb 6 2015, 3:44am replied:

There's a couple possibilities. Make sure you're installing the correct SKU version of EP1 Update 1. An incorrect SKU will act like it has patched, but it'll only do the job partially. You can safely try the others until you get the one that works. Also, make sure you're not using a NoCD executable. The NAM installer won't recognize those as valid patched installs.

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Guest Feb 6 2015, 6:45pm replied:

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polloio Jan 27 2015, 3:43am says:

Guys, I love you for bringing new life to this classic management game!! Keep the good work up!! ;)

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Guest Jan 24 2015, 5:57am says:

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TarkusSC4 Creator
TarkusSC4 Jan 26 2015, 2:28am replied:

By "old version", are you referring to an unpatched copy of SC4 Deluxe (Version 1.1.610)? If so, you'll need EP1 Update 1, which is available at SC4 Devotion ( Just click the "EA Support" logo on the left sidebar.

If you're referring to "vanilla" SC4 (i.e. not Deluxe and without Rush Hour), then the NAM won't work on your game.

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TarkusSC4 Creator
TarkusSC4 Jan 15 2015, 9:45pm says:

Note to Mac users: if you require technical support, you are more likely to get quicker and more detailed assistance if you visit one of the main SC4 forums.
SC4 Devotion ( is where the developer responsible for producing the Mac package (and the only Mac user on the NAM Team) is based. Simtropolis ( also has an active SC4 Mac Users board, with a couple of very active advanced users, who are good at sorting out things.

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Guest Jan 14 2015, 2:52pm says:

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TarkusSC4 Creator
TarkusSC4 Jan 15 2015, 9:40pm replied:

Make sure you didn't accidentally install just the "Traffic Simulator Only" option. If you require more help with the Mac version, I'd check one of the forums ( or The knowledgeable Mac users don't really check this comment page (I'm not a Mac user).

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Simbro Jan 14 2015, 8:52am says:

Hi Tarkus. I've got a problem with NAM. I have recently downloaded it from Sim Divotion and ran into a problem. Basically, when I use the puzzle pieces, the game crashes. I've got all the dependencies and files for the game and it is compatible with my system. I've also used NAM before, but nothing like this has ever happened. My map is also clear of any TE or stations and I'm only trying to create a dirt road leading to a small village. It doesn't crash the game instantly, it usually lets me use the puzzle pieces for about 5 min. Then it crashes. I've read everything on the forum related to this issue including the stuff on this page. I don't know how to use the JDatPacker though, any help would be appreciated.

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TarkusSC4 Creator
TarkusSC4 Jan 15 2015, 9:37pm replied:

Replied to your previous post. Also, the NAM has no dependencies. Check the info in my earlier post, and also try a different city tile/region with a plugins folder that is clear of everything except the NAM.

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Released Jul 28, 2014
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Jan 27 2011, 6:56pm by XxKillTheLightsxX

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Latest tweets from @tarkussc4

The #NetworkAddonMod is 11 years old today. Version 1 was released on April 24, 2004. #simcity4

18hours 27mins ago

#NAM33 inching toward alpha build for internal testing. Goal is to do a pre-release again. No release date or timeline for release.

Apr 9 2015, 2:37am

Maxis, thanks for the memories. Best wishes to @MaxisGuillaume and crew in Emeryville. #RIPMaxisEmeryville

Mar 4 2015, 6:14pm

Congrats, @Simtropolis on hitting the 100,000,000 download milestone! Glad to have been along for the ride.

Feb 13 2015, 4:33pm

@ModDB is hosting its 2014 Mod of the Year Awards--vote for the NAM!

Dec 3 2014, 2:13am

New on SimTarkus: SC4 is now safe to buy on Origin. Thanks to @OriginInsider for quickly making things right.

Aug 27 2014, 3:30pm

@UPSLynx: Thanks for the quick response on this. I'll spread the good news!

Aug 27 2014, 3:07pm

New at SimTarkus: an update on the SC4/Origin (@OriginInsider) situation.

Aug 27 2014, 3:05am

Getting some reports that Origin SC4 users are logging onto the service and being told there's an update. Currently investigating further.

Aug 26 2014, 11:09pm

And @pcgamer has picked it up.

Aug 25 2014, 11:48pm

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