It slows down the entire network stack, so you can't throttle on a per app basis without doing things like install lion in a virtual machine and set that VM with a throttled stack. If you need other limits, you can create custom profiles with your own settings or you can also use ipfw yourself as described in Craig Hockenberry's article slow ride, make it easy It also mentions the Speed Limit panel by Mike Schrag that is a smaller download than Xcode, but has fewer options than Apple's tool. It isn't always possible to download these Xcode Command Line Tools, following these steps, on Mac’s running older operating systems. There are 11 built in profiles from a Lossy Edge network with 400ms delay to a cable modem. We recommend following these steps for those with the following operating systems running on a Mac: macOS 10.13 High Sierra, macOS 10.14 Mojave, and macOS 10.15 Catalia onward. This SO thread documents some history of the tool in a similar manner to the iOS simulators and developer documentation.
Older versions of Xcode before version 4.3.2 embedded a copy of this tool. Apple’s official tool to slow down the network connections on you Mac for testing purposes is Network Link ConditionerĪdditionally, iOS has similar function accessible from within Xcode and iOS 6 or later.
