RATE-LIMITED SERVER 200 MB
Up to 15xfaster than a single connection
JMacy3.28s
1 connection49.96s
Elapsed download time. Lower is better.
Native Mac download manager
Big downloads.
Made for Mac.
16 parallel connections. Browser capture. Torrents built in.
JMacy is a native macOS download manager for Apple silicon and Intel Macs on macOS 14 and later, made by Greycore Labs. It splits each file across up to 16 parallel connections, captures downloads and page media from your browser, and opens magnet links and .torrent files in the same app.
7-day free trial. Full features. No card.
Mac with Apple silicon? Apple silicon build Intel Mac? Intel build
See it work
Watch JMacy run.
A 54-second silent screen recording. No sound needed.
01 / The numbers
Less time in the queue.
16 connections per file. Dynamic re-splitting.
Here’s what that looks like on the clock.
REAL INTERNET Tele2 · 100 MB
2x fasterthan JDownloader out of the box
JMacy7.1s
JDownloader16.0s
Default settings. Elapsed download time. Lower is better.
Measured in the conditions shown. Download speeds depend on your connection and the server.
JMacy is a Mac alternative to JDownloader. On default settings over a real connection, JMacy downloaded 100 MB in 7.1 seconds against JDownloader’s 16.0 seconds, about 2x faster. On a rate-limited server, its 16 connections downloaded 200 MB in 3.28 seconds against 49.96 seconds for a single connection, up to 15x faster.
02 / The details
Fast is only the beginning.
Built for the interruptions, limits, and little things
that come with downloading.
Connections that adapt.
16 parallel connections with dynamic re-splitting. When a server limits connections, JMacy backs off instead of stalling.
Pick up where you left off.
Pause now. Resume later. Your downloads can resume after a crash or power loss, too.
Check the file you get.
Verify downloads with SHA-256. Combine servers with mirrors.
A little more Mac.
Speed in your menu bar. Notifications when you need them. A badge in your Dock.
From a link to your list.
A clipboard watcher and jmacy:// links bring downloads into JMacy.
Your Mac. Your downloads.
No telemetry. No account to create. Read exactly what the app sends.
03 / Browser capture
In your browser.
On your Mac.
Capture downloads and media from the page you’re on. They appear live in JMacy.
Cookies from the downloading site come along, so logged-in downloads work.
mp4mp3webm
- Chrome
- Aside
- Brave
- Edge
- Arc
- Vivaldi
- Safari
Chrome Web Store Mac App Store (Safari) Download extension (ZIP)
Set up your browser
04 / Torrents, included
The whole swarm.
In the same app.
Open magnet links and .torrent files in JMacy. Set your upload limit. No forced seeding.
- Average speed
- 37 MB/s
- Peers
- 47
Measured downloading a 756 MB Debian ISO. The screenshot shows one moment during a download.
05 / Yours to keep
One purchase.
Up to three Macs.
Try every feature for 7 days.
No card needed to get started.
JMacyFor your MacONE-TIME$12.99pay once
- Full features
- Use on up to 3 Macs
- Free updates for 1.x
- Money-back within 14 days
macOS 14+ · Apple silicon
How does the free trial work?
Download JMacy and try the full app for 7 days. All features are included. No card is required.
What if it’s not for me?
You can get your money back within 14 days. Contact support@greycorelabs.com for a refund.
How many Macs can I use?
Your $12.99 license covers up to 3 Macs. See license help to activate on another Mac or deactivate a Mac.
Does JMacy support torrents?
Yes. Magnet links and .torrent files are built in, with an upload limit you control and no forced seeding. Use JMacy for content you have the right to download.
Does it work with Safari?
Yes. The browser extension supports Safari, Chrome, Aside, Brave, Edge, Arc, and Vivaldi. See browser setup.
Is JMacy an IDM alternative for Mac?
Yes. JMacy is a native Mac download manager with the parts people look for in IDM: up to 16 parallel connections per file with dynamic re-splitting, resume after a pause or power loss, and a browser extension that captures downloads. It runs on macOS 14 and later, on both Apple silicon and Intel Macs.
Can it download from sites that need a login?
Yes. The JMacy browser extension captures a download from the page you’re on and brings that site’s cookies along, so downloads that require you to be signed in still work. Use JMacy for content you have the right to download.
How is JMacy different from JDownloader?
JMacy is a native Mac app built for macOS 14 and later, on both Apple silicon and Intel Macs. In our own testing, a 100 MB download finished in 7.1 seconds against 16.0 seconds for JDownloader with default settings. JMacy also adds browser capture, SHA-256 verification, mirrors, and built-in torrents in one app.
Can JMacy resume a download after a crash or restart?
Yes. You can pause and resume any download, and downloads can resume after a crash or power loss, so a large file does not have to start over.
Are updates included?
Yes. Your one-time purchase includes free updates for JMacy 1.x.
What about the App Store and sandboxing?
Download JMacy directly from this site as a signed and notarized Mac app. If you need details about sandbox requirements, contact Greycore Labs.
How do I uninstall JMacy?
Quit JMacy, then move the app from Applications to the Trash. Remove the JMacy extension from your browser’s extension settings. To deactivate a Mac on your license, see deactivation help.