As the title says, when I try to install packages via homebrew through my home network, I get the following error:

curl: (35) LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to akamai.bintray.com:443 
Error: Failed to download resource "rclone"
Download failed: https://homebrew.bintray.com/bottles/rclone-1.38.high_sierra.bottle.tar.gz

However, I can download from the .tar.gz URL that is specified just fine through my browser.

I know this is only a problem with my home network because when I tether my phone it works fine.

Probably got something to do with my router settings and/or ISP but I am not sure where to look.

Thanks for the help! :)

  • 1
    Did you ever figure this out? I'm seeing the same issue and it is also limited to my home network. Feb 4, 2018 at 3:14
  • 1
    Nope, I just use another network for this stuff :( Feb 5, 2018 at 4:22
  • 1
    I managed to fix it by adding --ciphers ECDHE-RSA-AES128-GCM-SHA256 to the curl request. Another solution is to download a newer version curl. Feb 25, 2018 at 23:27
  • 1
    Thanks man, how did you figure it out? Also can you tell me which curl version you installed to get it working, because I got the latest version and its still not working :( I'm on Mac OSX Mar 1, 2018 at 16:23
  • 1
    @AlexanderEkdahl do you why this happens by any chance? I am curious Mar 2, 2018 at 18:00

3 Answers 3


A thought occurs to me -- have you checked your router to see if it is doing a transparent proxy for you?

If it is, then you may want to turn that off.

If you can't turn it off, then you might want to install a VPN solution that will allow you to bypass it.

Just a thought.

  • Thanks. By the router acting as a transparent proxy, I guess it means all my requests are intercepted by the router? Is this a security risk even if my traffic is https encrypted? Sep 27, 2018 at 8:45

Since you're using LibreSSL, try re-installing curl with OpenSSL instead of Secure Transport.

The latest brew, it depends on OpenSSL by default, so you've to reinstall it:

brew reinstall curl

For older Brew, there was an option --with-openssl which was removed, e.g.

brew reinstall curl --with-openssl

Here are few other suggestions:

  • Run brew options curl to display install options specific to formula.
  • Compile from the source. Check curl.rb formula for more details.
  • Make sure you're not using http_proxy/https_proxy.
  • Use -v to curl for more verbose output.
  • Try using BSD curl at /usr/bin/curl, run which -a curl to list them all.
  • Make sure you haven't accidentally blocked curl in your firewall (such as Little Snitch).
  • Alternatively use wget.
  • brew reinstall curl --with-openssl get Error: invalid option: --with-openssl
    – Jeff Tian
    Mar 15, 2019 at 10:07
  • Check brew options curl to display install options specific to formula, as per manual.
    – kenorb
    Mar 15, 2019 at 13:21
  • Thanks for the reply. But my brew options curl gives empty result. What gives?
    – Jeff Tian
    Mar 18, 2019 at 2:24
  • It seems the option was removed, try reinstalling it without any option. I've updated the answer.
    – kenorb
    Mar 18, 2019 at 11:41
  • 1
    Try: brew uninstall curl. The one which comes from macOS, you can't uninstall it. You need to install new one in /usr/local and Brew should adjust $PATH, to point to the new one first.
    – kenorb
    Mar 19, 2019 at 14:07

For those who are still struggling to resolve this.

Please try:

brew update-reset
brew update # This might not be needed.

I found this gem here.

  • it work for me.
    – 任喜军
    Jul 15, 2021 at 9:17
  • me too, I tried a thousand of other solutions but only update-reset do the magic!
    – RikiRiocma
    Jun 26, 2022 at 8:44

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