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jDM 5 — Release Notes

Includes updates from versions 5.0 through 5.3

February 2024 - March 2025

jDM 5 marks a major evolution in download management on macOS — introducing a redesigned interface, unified toolbar, and a more intelligent multi-connection engine for faster and more reliable downloads. The 5.x series enhances every part of the app: from dynamic segmentation and authentication handling to Finder tag integration, proxy support, and customizable download categories. Versions 5.1–5.3 continue to refine performance, polish the user experience, and improve macOS compatibility, making jDM faster, smarter, and more efficient than ever.

Download jDM on the Mac App Store

Requires macOS 10.13 (High Sierra) or later

Need help with this release? Visit our Support page or contact us at support@sientosh.com.

jDM 5.3

Released on 11 March 2025

A stability and performance update focused on smarter segment handling, reliable connection recovery, and improved task creation workflow.

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Downloader

  • Enhanced segmented downloading by dynamically adjusting segments based on the transfer rate of each individual connection — ensuring better bandwidth utilization.
  • Fixed an issue where files could become corrupted when automatically retrying a timed-out connection.
  • Resolved a bug where completed downloads were occasionally not marked as finished when all segments had successfully completed.
  • Improved background writing of download logs to reduce blocking and improve performance.

New Task

  • Improved URL handling — added support for data: and file: URL schemes.
  • Task details (filename, path, description, etc.) now remain unchanged when replacing a URL with one from the same domain.
  • Resolved visual issue where selection was sometimes drawn outside the URL field.
  • Fixed an issue where a small file icon would sometimes appear in a new task window.

Built-in Browser

  • Added helpful on-screen instructions for adding downloads directly from the built-in browser.

Settings

  • Fixed an issue where “%” was incorrectly added to category names created from new tasks or file moves.
  • Cookie source browser type now remains unchanged once added, ensuring consistent authentication handling.

Application

  • Fixed Dock tile progress not displaying on macOS 10.14 (Mojave).
  • Resolved an issue where “Main Window” option in the menu bar did not bring the app to focus when another window was active.

jDM 5.2

Released on 17 May 2024

A reliability update improving download list management, progress display handling, and overall app stability across macOS versions.

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Main Window

  • Fixed a crash that could occur when rearranging items in the download list while it was filtered by categories.
  • Resolved an issue where the table view did not remember the selected progress display layout — either the individual column view or the inline progress bar beneath each active download.

Application

  • General stability improvements and minor bug fixes across the app.

jDM 5.1

Released on 10 May 2024

This update refines task creation and automation, adds flexible progress bar layouts, and enhances overall compatibility and visual consistency across macOS versions.

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New Task

  • Added drag & drop support — drop text containing URLs onto the Dock icon to instantly add new downloads.
  • Use the macOS “Services” menu to create downloads directly from selected text.
  • Improved handling of filenames and pasteboard content for more accurate file naming.
  • Enhanced detection for URLs requiring authentication.
  • New Task window now automatically deselects authentication-cancelled items.
  • Site Grabber automatically removes unsupported and 404 Not Found URLs.
  • Updated button style and layout for better visual consistency in multi-task windows.

Main Window

  • Introduced an option to choose progress bar layout — display progress below each download row or as a dedicated column.
  • Improved contrast between table selection color and progress indicators for clearer visibility.
  • Updated interface assets and toolbar button sizes for macOS Big Sur, Monterey, Ventura, and Sonoma.
  • Adjusted toolbar segment controls to match macOS Big Sur and Sonoma display modes.
  • Log files of completed tasks are now cleaned automatically after one week to save storage.
  • Fixed a crash when grouping or ungrouping downloads due to table selection issues.
  • Fixed: Notifications now work correctly on macOS Big Sur and later.

Built-in Browser

  • Resolved overlapping UI elements in built-in browser prompts and improved HTML redirect handling.

Settings

  • Fixed: New task cookies now delete automatically after one month as intended.

Application

  • Removed legacy data from pre-5.0 versions and improved migration handling to jDM 5.1.
  • Introduced onboarding views for welcome, permissions, and progress layout selection.
  • Created default download folders automatically during onboarding for seamless file movement.
  • Improved overall app stability and responsiveness.

jDM 5.0

Released on 19 February 2024

Version 5.0 introduces a rebuilt downloader core with smarter task handling, improved speed consistency, and enhanced reliability. The release modernizes the interface with a unified toolbar, refined macOS integration, and a smoother overall workflow.

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Downloader

  • Redesigned download engine with dynamic segmentation — connections are added one by one after successful responses for optimal reliability.
  • Transfer rate and remaining file size are intelligently considered before adding new connections to improve speed and stability.
  • Prevents “Error 416” and file corruption by handling incorrect content-length responses gracefully.
  • Detects download resume capability dynamically, independent of the initial server response.
  • Automatically adjusts filename and download directory when file type changes after response.
  • Alerts user if the file modification date on the server has changed when resuming a download.
  • Authentication flow simplified — detailed instructions provided for cookie-based authentication from built-in or external browsers.
  • Remembers the source browser for cookies, allowing seamless cookie refresh when they expire.
  • Notifications are sent when authentication is required while app is inactive; Dock icon bounces for attention.
  • Improved persistence format for resume data and overall download reliability.

New Task

  • Streamlined “New Task” window — simplified layout and faster URL detection.
  • Users can modify filename, referrer, description, path, and start type while waiting for server response.
  • Supports adding multiple URLs through drag-and-drop, copy-paste, or manual entry in multiple “New Task” windows.
  • Added “This Page Only” option in Site Grabber to limit results to the current page.
  • Site Grabber can now detect and list all available streams for M3U8 (master) URLs.
  • Finder tags can be assigned to downloads and are applied automatically when files are saved.
  • Added dropdown for quick path selection from existing download categories.
  • Improved URL parsing in plain text and batch downloads grouping support.
  • Up to 4 simultaneous requests are made in Site Grabber and multi-task window for faster URL discovery.

Main Window

  • Unified toolbar design with refreshed icons and modern macOS look.
  • Updated “Add” button with dropdown menu for all new task options.
  • Progress column removed — progress bars now appear at the bottom of each row for pending downloads.
  • Improved moving of downloaded files, including progress and error reporting.
  • Added support for grouping and ungrouping of downloads with visual grouping indicator.
  • Filter List Control redesigned with dynamic highlight matching status colors in the table.
  • Redesigned status bar, filter bar and Dock progress indicator.
  • Improved sorting, filtering, and animated insertion/removal of download items.

Built-in Browser

  • Completely new interface with unified toolbar and integrated progress bar.
  • Always runs in incognito mode — website data is cleared when the window closes or a new domain is visited.
  • Automatically restores authentication cookies saved in Settings when revisiting websites.
  • Referrer and cookies are passed with each URL for accurate authentication.
  • Option to apply current authentication action to all URLs in the queue.
  • Fixed: Web View not navigating to popup pages.

Inspector

  • Redesigned inspector window with resizable address, referrer, and description fields.
  • Filename field selects only the name (without extension) for easier editing.
  • Quickly move files between existing download locations using a dropdown selector.
  • Added navigation shortcuts for next and previous items within Inspector or multi-task window.
  • Displays number of items in a group under “Size”.

Segments

  • Redesigned Segments window with real-time progress updates for each connection.
  • Accurate updates for status, time left, and progress in multi-connection downloads.
  • Added support for “Copy URL” and “Copy Referrer” actions directly from Segments window.
  • Improved visualization of stream segments and grouped connections.

Settings

  • Redesigned Preferences panes — General, Extensions, Scheduler, Directories, Authentication, and Advanced.
  • Added new Proxy Settings supporting HTTP, HTTPS, and SOCKS5 proxies with domain exclusion.
  • “Directories” pane allows assigning Finder tags and custom images to download categories.
  • Download category images and tags appear across the app — in filter bar, new task window, and inspector.
  • Added option to delete “New Task” cookies automatically after one month.
  • Added “Automatic” user agent mode — uses source browser as agent when downloads are sent through extensions.
  • Option to automatically resume timed-out downloads and choose between binary or decimal file size display.
  • Improved cookie management using encrypted storage for enhanced security.

Main Menu

  • New Add menu grouping all download creation options.
  • Added “Downloads” submenu under “View” to filter downloads by status.
  • New “Move” and “Move to” commands for transferring selected files between locations.
  • Added “Group” submenu for creating, ungrouping, or adding downloads to existing groups.
  • Added “Copy Referrer” option and navigation shortcuts for Next / Previous items in inspector or new task windows.

Application

  • Introduced a refreshed jDM file icon and unified system-wide design.
  • Dropped support for macOS 10.10 – 10.12; now requires macOS High Sierra (10.13) or later.
  • Added menu bar icon for quick access — add, resume, pause, or open main window directly.
  • Improved persistence for reliability and I/O performance.
  • Enhanced security using encryption for cookies and sensitive data.
  • Many other stability and performance improvements across the app.
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jDM 4 Release Notes

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jDM Release Notes

Discover the complete jDM release history — explore every version, feature milestone, and performance enhancement that shaped the evolution of macOS download management.