Get Viaduct 1.3.0 for Mac

Viaduct is a Mac utility that turns a Chrome extension into a Safari extension you can actually use.

1. Grab the Chrome extension file you've already downloaded, or copy a Chrome Web Store link.
2. Drop the file into Viaduct or paste the link you copied. The app handles the conversion and automatically re-signs the extension so Safari accepts it.
3. Once it finishes, the extension shows up in Safari's settings, ready to enable like any other.

It sits nicely alongside the tools you already keep around for tweaking your Mac—a converter that covers both Apple Silicon and Intel machines, running on macOS 13 or later. The paid version keeps things simple with ongoing re-signing so extensions don't expire on you. For anyone who's ever wished a Chrome-only tool could live in Safari, this one fills the gap without fuss.

Working with extensions from outside the App Store sometimes leaves Safari unsure what to do with them, and Viaduct smooths over a lot of that confusion. The 1.3.0 release tightened up how it handles expired signatures: instead of just flagging a problem, the app now re-signs the extension quietly in the background a few days before the certificate lapses. That means less time digging through Safari’s preferences to figure out why a toolbar button vanished overnight. The same update improved link parsing for Chrome Web Store URLs that include extra tracking parameters—you can paste a messy link copied from a blog post or a forum thread, and Viaduct strips away the cruft to grab the right extension.

If you’ve hunted around for a viaduct torrent mac download, you already know the landscape: a handful of utilities promise similar Chrome-to-Safari bridging, each with its own quirks. xcLEAner takes a broader approach, sweeping up leftover extension files and caches after conversion, but it doesn’t handle the signing step at all—you’re left to run Apple’s command-line tools yourself. ExtensionDock focuses on organizing extensions across browsers rather than converting them; it can copy settings between Chrome and Safari versions of the same tool, but it won’t create a Safari extension where one doesn’t exist. Viaduct sits in the middle: it does one job, the conversion and signing, without branching into system cleanup or cross-browser sync. That narrow scope keeps the interface a single window instead of a dashboard you have to learn.

Sorting out the usual hiccups

A freshly converted extension sometimes refuses to appear in Safari even after Viaduct reports success. Nine times out of ten, Safari’s extension list needs a nudge—quit the browser completely, reopen it, and head straight to Safari > Settings > Extensions. The newly converted item usually shows up on the second launch. If it still hides, check whether you’ve got another copy of the same extension already installed from a different source; Safari gets confused by duplicate bundle identifiers, and removing the older version clears the way.

Dragging a .crx file onto Viaduct occasionally triggers a “can’t read file” message. That happens when Chrome encrypts the extension during download, which is common with extensions pulled directly from the Chrome Web Store on newer versions of the browser. The workaround is straightforward: use the paste-link method instead of the file drop. Copy the store URL, paste it into Viaduct, and let the app fetch the unpacked source itself. The conversion engine handles the rest without tripping over encrypted packaging.

On Apple Silicon Macs running macOS 14 or later, Gatekeeper sometimes flags the converted extension as unidentified software the first time Safari loads it. That’s not a conversion error—it’s Safari applying stricter checks to extensions that weren’t notarized through Apple’s developer program. Opening System Settings > Privacy & Security, scrolling to the security section, and allowing the extension manually resolves it. After that initial approval, the re-signing feature in Viaduct prevents the warning from reappearing.

• macOS 13 or later
• Apple Silicon or Intel Mac