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I know my upload speed is limited at about 100/110KB/s, sometimes I reach this limit and it impacts the connexion of other computer of my home network.

Is there a way to tell OSX to limit its upload speed to (for example) 80KB/s ?

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2 Answers 2

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Network Link Conditioner

You can create a custom profile for Network Link Conditioner, using the following settings:

It is a free download in Xcode (go to Xcode → Open Developer Tool → More Developer Tools… and download the Hardware IO Tools for Xcode).

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  • 1
    That's exactly the kind of tool I was looking for !
    – Matthieu Riegler
    Nov 30, 2013 at 18:20
  • 1
    Solved my issue as well. Was using all upload bandwidth and ended up killing the internet completely when I was uploading files for work. Now I can upload and use the internet at the same time! Imagine that!
    – Ian
    Feb 19, 2016 at 20:36
  • allow me to push my LFS objects to work git, without disconnecting my kids' zoom school session!
    – Guy
    Nov 10, 2020 at 9:40
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Two ways that I can think of:

1. Install Apple's Network Link Conditioner

2. Use ipfw commands to create a pipe and limit bandwidth:

sudo ipfw pipe 1 config bw 80KByte/s

sudo ipfw add 1 pipe 1 src-port 80

To disable the pipe:

sudo ipfw delete 1

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