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[GH-ISSUE #1344] [Bug]: Brew install fails with 'Download failed - Failed to connect to download.todesktop.com port 443 after 5 ms: Couldn't connect to server' #371

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opened 2026-10-31 22:12:09 +00:00 by bsakaguchi · 5 comments

bsakaguchi commented

2026-10-31 22:12:09 +00:00

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Originally created by @sammcj on GitHub (Sep 24, 2025).
Original GitHub issue: https://github.com/Comfy-Org/desktop/issues/1344

App Version

None yet!

Expected Behaviour

Install via homebrew to work

Actual Behaviour

brew install comfyui
==> Downloading https://download.todesktop.com/241012ess7yxs0e/ComfyUI%200.4.74%20-%20Build%20250924sn4vw8lfo-arm64-mac.zip
curl: (7) Failed to connect to download.todesktop.com port 443 after 5 ms: Couldn't connect to server

Error: Download failed on Cask 'comfyui' with message: Download failed: https://download.todesktop.com/241012ess7yxs0e/ComfyUI%200.4.74%20-%20Build%20250924sn4vw8lfo-arm64-mac.zip

The URL it tries to download from appears to be broken.

Steps to Reproduce

Run brew install comfyui

Debug Logs

N/A

Browser Logs

N/A

Settings JSON

N/A

Other

No response

Originally created by @sammcj on GitHub (Sep 24, 2025). Original GitHub issue: https://github.com/Comfy-Org/desktop/issues/1344 ### App Version None yet! ### Expected Behaviour Install via homebrew to work ### Actual Behaviour ``` brew install comfyui ==> Downloading https://download.todesktop.com/241012ess7yxs0e/ComfyUI%200.4.74%20-%20Build%20250924sn4vw8lfo-arm64-mac.zip curl: (7) Failed to connect to download.todesktop.com port 443 after 5 ms: Couldn't connect to server Error: Download failed on Cask 'comfyui' with message: Download failed: https://download.todesktop.com/241012ess7yxs0e/ComfyUI%200.4.74%20-%20Build%20250924sn4vw8lfo-arm64-mac.zip ``` The URL it tries to download from appears to be broken. ### Steps to Reproduce 1. Run `brew install comfyui` ### Debug Logs ```powershell N/A ``` ### Browser Logs N/A ### Settings JSON N/A ### Other _No response_

bsakaguchi

2026-10-31 22:12:09 +00:00

closed this issue
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bsakaguchi commented

2026-10-31 22:12:10 +00:00

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@dosubot[bot] commented on GitHub (Sep 24, 2025):

The Homebrew install is failing because the cask tries to download from a ToDesktop-generated URL that is currently unreachable or broken. This URL is not managed in the ComfyUI desktop repo and may be outdated. The official documentation recommends a different direct download link for macOS ARM: https://download.comfy.org/mac/dmg/arm64 — this installer is up to date and should work as a workaround until the Homebrew cask is fixed or the server issue is resolved [docs].

If you see similar errors with other URLs, check your network, firewall, or proxy settings, but in this case the problem is almost certainly with the download server itself, not your setup. There are no open issues or recent changes in the desktop repo related to this Homebrew cask or its download URL, so the fix will need to happen in the cask definition outside this repo.

To reply, just mention @dosu.

Docs are dead. Just use Dosu.

@dosubot[bot] commented on GitHub (Sep 24, 2025):  The Homebrew install is failing because the cask tries to download from a ToDesktop-generated URL that is currently unreachable or broken. This URL is not managed in the ComfyUI desktop repo and may be outdated. The official documentation recommends a different direct download link for macOS ARM: [https://download.comfy.org/mac/dmg/arm64](https://download.comfy.org/mac/dmg/arm64) — this installer is up to date and should work as a workaround until the Homebrew cask is fixed or the server issue is resolved [[docs](https://docs.comfy.org/installation/desktop/macos)]. If you see similar errors with other URLs, check your network, firewall, or proxy settings, but in this case the problem is almost certainly with the download server itself, not your setup. There are no open issues or recent changes in the desktop repo related to this Homebrew cask or its download URL, so the fix will need to happen in the cask definition outside this repo.  *To reply, just mention [@dosu](https://go.dosu.dev/dosubot?utm_source=github&utm_medium=bot-comment&utm_campaign=github-comment-footer-20260415&utm_content=reply-with-mention&utm_term=Comfy-Org%2Fdesktop).* --- Docs are dead. Just use [Dosu](https://dosu.dev?utm_source=github&utm_medium=bot-comment&utm_campaign=github-comment-footer-20260415&utm_content=static-docs-tagline&utm_term=Comfy-Org%2Fdesktop). 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bsakaguchi commented

2026-10-31 22:12:11 +00:00

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Owner

@sammcj commented on GitHub (Sep 24, 2025):

Figured it out, it looks like the domain download.todesktop.com is blocked by some firewalls and adblockers.

I had to allow list the domain temporarily for the install to work.

@sammcj commented on GitHub (Sep 24, 2025): Figured it out, it looks like the domain `download.todesktop.com` is blocked by some firewalls and adblockers. I had to allow list the domain temporarily for the install to work.

bsakaguchi commented

2026-10-31 22:12:11 +00:00

Author

Owner

@webfiltered commented on GitHub (Sep 24, 2025):

Yikes, that is unexpected! @sammcj Any chance you'd be willing to let us know the software/service that blocked it? I'm quite sure the people over at ToDesktop would love to address whatever is causing them to get blacklisted.

@webfiltered commented on GitHub (Sep 24, 2025): Yikes, that is unexpected! @sammcj Any chance you'd be willing to let us know the software/service that blocked it? I'm quite sure the people over at ToDesktop would love to address whatever is causing them to get blacklisted.

bsakaguchi commented

2026-10-31 22:12:11 +00:00

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@fennelfora commented on GitHub (Jun 8, 2026):

I just came across this so I guess they’re still on lists. I know at least AdGuard is blocking it by default. I recently installed it so it’s still on original rules at the moment. As soon as I switched my network I had no problem running “brew install comfyui”.

@fennelfora commented on GitHub (Jun 8, 2026): I just came across this so I guess they’re still on lists. I know at least AdGuard is blocking it by default. I recently installed it so it’s still on original rules at the moment. As soon as I switched my network I had no problem running “brew install comfyui”.

bsakaguchi commented

2026-10-31 22:12:11 +00:00

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@Reactor4028 commented on GitHub (Jun 13, 2026):

I just came across this so I guess they’re still on lists. I know at least AdGuard is blocking it by default. I recently installed it so it’s still on original rules at the moment. As soon as I switched my network I had no problem running “brew install comfyui”.

Original Link: https://download.todesktop.com/241012ess7yxs0e/ComfyUI%200.9.4%20-%20Build%20260528kd5rbl6yc-arm64-mac.zip

I ran: https://download.todesktop.com/ against https://semonto.com/ and a few other down detectors and everything says it is down.

@Reactor4028 commented on GitHub (Jun 13, 2026): > I just came across this so I guess they’re still on lists. I know at least AdGuard is blocking it by default. I recently installed it so it’s still on original rules at the moment. As soon as I switched my network I had no problem running “brew install comfyui”. Original Link: https://download.todesktop.com/241012ess7yxs0e/ComfyUI%200.9.4%20-%20Build%20260528kd5rbl6yc-arm64-mac.zip I ran: https://download.todesktop.com/ against https://semonto.com/ and a few other down detectors and everything says it is down.

bsakaguchi referenced this issue

2026-10-31 22:17:14 +00:00

[PR #371] [MERGED] Use Comfy Org version of Manager. #825

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