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Karui for Mac

Makes Karui for iPhone even smarter
Download for macOS
Free and open source. Requires Karui on your iPhone, and the same iCloud account on both.
Karui for Mac on a MacBook Air: the compact view, a table of today’s notifications with Category, App, Sender, Notification, and Time columns. The expanded view: each notification with Karui’s verdict and reason; one read here is marked as cleared on the iPhone.

Karui for Mac improves spam filtering on your iPhone.

Notifications that you read on your Mac clear on your iPhone.

Setting up

Privacy

Everything goes through the private part of your iCloud account, which only your devices can read. The Mac sends a fingerprint of each notification, its link, and whether you’ve read it, never its text. With History on your Mac turned on, your iPhone sends Karui’s decisions and each notification’s text, end-to-end encrypted. Addresses you’ve written to leave the Mac only as hashes. Links are deleted after a day; History stays on the Mac for a month.

Reading Notification Center’s database needs Full Disk Access. Only Messages, Spark, and Slack notifications are decoded. That’s a lot to ask of an app, which is why this one is open source.

View the source code on GitHub.

How it works

On your Mac Notification Center’s database + Messages’, Spark’s, and Slack’s data Reads, with Full Disk Access Karui for Mac Finds each notification’s message or email Your iCloud account Private; only your devices can read it Karui for iPhone Sorts your notifications LinksRead marksHashes of sendersyou’ve written to DecisionsNotification text,encrypted

Karui for Mac watches Notification Center for Messages, Spark, and Slack, finds each notification’s message or email in that app’s own database, and sends your iPhone a link to it through iCloud. Tap Karui’s alert on the iPhone and the right thread opens. Read one on the Mac and the alert clears on the iPhone.

Once a day it sends hashes of the addresses you’ve written to in Spark and Messages, never the addresses themselves, so with “Alert for senders you’ve written to” turned on, their notifications get through like a saved contact’s. With History on your Mac turned on, the Mac shows your History too, and read marks, categories, and deletions carry over both ways.

The Mac has to be on and logged in; it can be locked.

Changelog

0.11.8

November 13, 2026
  • A new notification no longer shows as selected but unread when it arrives while you have another one selected.

0.11.7

November 12, 2026
  • Karui no longer stalls for a few seconds when notifications arrive from your iPhone while you read one on your Mac.

0.11.6

November 12, 2026
  • Your iPhone keeps alerting quietly while you read or watch something on your Mac: Karui now waits 2 minutes without a key press or pointer movement, not 1, before telling it you've left. Locking or sleeping your Mac still counts at once.

0.11.5

November 12, 2026
  • After you click one of Karui's banners, the app it opens stays in front, instead of Karui coming back over it.

0.11.4

November 12, 2026
  • Clicking one of Karui's banners now opens the notification where it goes, in its app or the Messages conversation, the way a double-click in Karui does, instead of only showing it in Karui.

0.11.3

November 11, 2026
  • After an iCloud outage, notifications that only reached your Mac go to your iPhone to be sorted again, instead of a notification counted twice holding them all back.

0.11.2

November 10, 2026
  • Contacts that LINE and some mail apps don't name for Shortcuts now show by their name in the Sender column, instead of "No Name".

0.11.1

November 10, 2026
  • Translates notifications in languages you don’t read, on this Mac, when Translate notifications is on in Karui on your iPhone. Needs macOS 26.4 or later.

0.11.0

November 10, 2026
  • While Karui Cloud Sorting is on in Karui on your iPhone, this Mac sorts with Karui Cloud too.

0.10.10

November 9, 2026
  • Fixed Karui for Mac 0.10.9 freezing while it checked your iPhone’s notifications.

0.10.9

November 9, 2026
  • Fixed a notification showing twice when your Mac got it before your iPhone did.

0.10.8

November 7, 2026
  • Notifications sorted on your iPhone by Karui Cloud, an invite-only program, now say “Sorted by Karui Cloud” in the inbox.

0.10.7

November 6, 2026
  • Reminders for your own events now always alert, like one-time codes: a calendar app’s “Today at 15:00” or “Leave by…”, and Spark’s “📅 … Starts in 10 minutes”.
  • Fixed look-alike notifications, such as Linear updates in Slack, sometimes sharing one row: selecting one selected both, and one of them could be lost.

0.10.6

November 6, 2026
  • Reading a notification in Spark, Slack, or Messages, or clearing it from Notification Center, now clears Karui’s alert on your iPhone within seconds, instead of it sometimes showing up quietly on your iPhone while you’re still at your Mac.

0.10.5

November 2, 2026
  • Opening a Slack notification now goes to the exact message, and a thread reply opens in its thread. Open Slack in the preview and Return both use the link.

0.10.4

November 2, 2026
  • The animated icon in the About window is drawn darker and heavier.

0.10.3

November 2, 2026
  • Marking a notification read here now clears its alert on your iPhone within seconds, with Karui 0.2.10 or later. The About window's animation has a darker tray.

0.10.2

November 2, 2026
  • The About window now shows the pencil sketch animation of the Karui icon.

0.10.1

November 2, 2026
  • A message you read in an open Messages conversation just before leaving your Mac is less likely to show up on your iPhone afterwards.

0.10.0

November 2, 2026
  • When you leave your Mac having read everything, Karui on your iPhone clears those alerts instead of showing them later.

0.9.6

November 1, 2026
  • Open Messages now opens a named group chat itself, instead of starting a new conversation with its members.

0.9.5

October 31, 2026
  • Second Opinion is now called Private Cloud Sorting, to match Karui on your iPhone.

0.9.4

October 30, 2026
  • Karui now sorts German notifications: with your Mac set to German, Apple Intelligence writes its reasons in German, and German words for urgent, sale, and travel notifications count.

0.9.3

October 27, 2026
  • When you read an email or message on this Mac before your iPhone's copy of it arrives, your iPhone now clears its alert too.

0.9.2

October 27, 2026
  • Messages that only reached your iPhone, because the conversation was open on this Mac, are now marked read here once you've read them in Messages.

0.9.1

October 27, 2026
  • Fewer late banners for notifications only your iPhone got: none for apps that are on this Mac, which show their own, or for ones you've already read.

0.9.0

October 27, 2026
  • When you leave your Mac, the notifications your iPhone held while you were here now reach it right away, and the ones you already read here don't. Needs Karui for iPhone 0.2.7.

0.8.16

October 26, 2026
  • Opening one of Karui's notifications now marks it read, including when it opens on its own screen.

0.8.15

October 26, 2026
  • When Second Opinion's Shortcut keeps failing, Karui waits before asking again, and now keeps waiting after Karui restarts or updates.
  • Setup steps catch your eye with a small, one-time animation.

0.8.14

October 26, 2026
  • Clicking one of Karui's notifications now shows that notification in Karui, selected with its preview, instead of only bringing Karui forward.

0.8.13

October 26, 2026
  • During a Focus that lets Karui through, Important notifications from Slack, Spark, and this Mac's other apps now come through as Karui's own. Karui reads which Focus is on from macOS, so there's no Focus filter to add.

0.8.12

October 26, 2026
  • During a Focus, Important notifications from Slack, Spark, and this Mac's other apps now come through as Karui's own. Add Karui to the Focus under Focus Filters in System Settings.
  • Fixed an Important notification your iPhone kept quiet while you were at this Mac sometimes not showing here.

0.8.11

October 25, 2026
  • Fixed more Spark emails showing twice, when your iPhone and this Mac each saw the email's text a little differently. Emails already showing twice become one.

0.8.10

October 24, 2026
  • Fixed some Spark emails showing twice, once as your iPhone sorted them and once as this Mac did.

0.8.9

October 24, 2026
  • Sorts notifications that name a deadline the same way as the latest Karui for iPhone, which now reminds you only of tasks that are clearly yours to do.

0.8.8

October 24, 2026
  • A sender you silence on your iPhone is Spam on your Mac too, in the app they wrote from.

0.8.7

October 23, 2026
  • A Slack direct message shows once, not twice: your iPhone's verdict now joins the Mac's own copy.

0.8.6

October 22, 2026
  • Slack posts a bot sends almost the same way every day, such as build uploads, no longer show twice or keep an earlier post's category.

0.8.5

October 22, 2026
  • Behind the scenes: Karui notes when Apple Intelligence says its limit on background sorting will lift, ready for the next Karui on your iPhone.

0.8.4

October 22, 2026
  • With the next Karui update on your iPhone, a Slack thread reply shows once even when your iPhone's verdict arrives late.

0.8.3

October 22, 2026
  • Slack thread replies show once, with the link that opens the reply, on this Mac and from your iPhone.

0.8.2

October 22, 2026
  • Spark emails open on your iPhone far more often: links now come from your iPhone's notifications too, not only this Mac's.
  • Emails Spark announces late, after the Mac wakes, get their links.

0.8.1

October 22, 2026
  • The preview shows Karui's search tags from your iPhone.
  • The search field has a button to clear it.
  • The preview's category, Sorted by, and tags lines are easier to read.

0.8.0

October 22, 2026
  • Search also finds notifications by Karui's tags from your iPhone, and by sender and recipients. Tags arrive once the iPhone has the next Karui update.

0.7.16

October 22, 2026
  • When Private Cloud Compute keeps failing through the Second Opinion Shortcut, as when it's rate limited, Karui for Mac pauses asking for a while and keeps the on-device model's answers.

0.7.15

October 22, 2026
  • The preview says what sorted each notification: Apple's on-device model, Private Cloud Compute, Karui's rules, or you. Notifications sorted on the iPhone show it once the iPhone has the next Karui update.

0.7.14

October 21, 2026
  • A notification you read on your iPhone stays read here when your iPad comes back online with an older copy of your History.

0.7.13

October 21, 2026
  • If the Focus you use with Karui on your iPhone keeps Karui’s banners on this Mac in Notification Center, the inbox now says how to let them through.

0.7.12

October 21, 2026
  • Turning on the Unread filter also clears selected notifications you'd already read from the preview, so it never shows one the list hides.

0.7.11

October 21, 2026
  • Turning on the Unread filter hides selected notifications you'd already read, instead of keeping them in the list.

0.7.10

October 21, 2026
  • Karui for Mac counts you as away after a minute without input, down from three, so your iPhone's alerts come back sooner when you walk away without locking your Mac.

0.7.9

October 21, 2026
  • Slack notifications open at their message again after Karui for Mac restarts. Before, a restart dropped their links, so opening one only opened Slack.

0.7.8

October 21, 2026
  • Slack messages open straight in the Slack app, without a stop in your browser.

0.7.7

October 20, 2026
  • With only unread notifications shown, one you select stays in the list until you select another.
  • The preview pane keeps the height you give it when filters change what the list shows.
  • Deadlines from Private Cloud Compute no longer treat a sender's own promise, like "I'll return it tomorrow", as your task.

0.7.6

October 20, 2026
  • Fixed your iPhone not going quiet while you use this Mac: the Mac's record saying you're here was never saved to iCloud.

0.7.5

October 20, 2026
  • The log now says when the record that tells your iPhone you're using this Mac can't be saved to iCloud, and why.

0.7.4

October 20, 2026
  • Fixed a reason that showed only “{” when Private Cloud Compute answered in an unexpected format.

0.7.3

October 20, 2026
  • The Dock badge, the menu bar count, and the unread dots now mean unread Important notifications only.
  • Fixed the Dock badge going missing after 0.7.0 asked for notification permission without it.

0.7.2

October 19, 2026
  • Your iPhone stays quiet while you use this Mac even with Karui's window behind other apps, and reading for a few minutes without touching anything no longer counts as away.

0.7.1

October 19, 2026
  • A preview pane under the inbox shows the selected notification without opening it. Turn it on in View → Show Preview (⌥⌘P).
  • With the preview open, Return opens the notification's message, conversation, or app.

0.7.0

October 19, 2026
  • While you're using this Mac, Karui on your iPhone alerts quietly, and this Mac shows the Important notifications only your iPhone received. Turn it off in Settings → iPhone.
  • Changes from your iPhone arrive right away, by push, instead of on the next check.

0.6.2

October 19, 2026
  • Reasons from Karui's rules, like a message from an important contact, appear in Japanese when this Mac sorts.

0.6.1

October 17, 2026
  • The inbox suggests the next step toward sorting on this Mac: turning on Show History on your Mac on your iPhone, adding the Second Opinion Shortcut, or sending notifications only this Mac received to your iPhone.

0.6.0

October 17, 2026
  • Sorts each notification as it arrives, with your iPhone's settings (macOS 26 or later with Apple Intelligence; turn on Show History on your Mac in Karui on your iPhone).
  • Second Opinion through your own Shortcut when it's on in Karui on your iPhone. Get the Shortcut in Settings → Sorting.
  • Notifications only this Mac received can go to your iPhone, already sorted.

0.5.5

October 16, 2026
  • Search filters the table as you type again, not only after leaving the field

0.5.4

October 16, 2026
  • A short message repeated days apart, like “Hi” from the same person, no longer takes over the older row and its time: each gets its own row, and read marks and deletions reach only the right one

0.5.3

October 15, 2026
  • Let column widths get bigger.

0.5.2

October 15, 2026
  • Improve performance while using the arrow keys to change the selected item rapidly.
  • Add links to open apps in either their macOS app or their website if no app is present.

0.5.1

October 15, 2026
  • Coming back from a notification or a group with ⌘[ puts the keyboard back on the list
  • ⌘F focuses the search field, and Escape leaves it for the list again
  • The About window and the Contacts prompt are in Japanese too

0.5.0

October 15, 2026
  • Threads group exactly as on the iPhone: a group chat by its members, so a renamed group stays one thread, using the subtitle, sender, and recipients the iPhone now sends
  • The same notification seen by both devices no longer appears twice when Spark fills in a subject line the iPhone leaves empty
  • If Notification Center's database goes missing, as it can after the disk runs full, Karui says so instead of blaming Full Disk Access, and picks it up again on its own
  • Return opens the selected notification or group, and ⌘[ goes back a level

0.4.8

October 15, 2026
  • Threads are grouped the way Karui for iPhone's History groups them: email threads by subject without the "Re:", Slack channels by name, X posts by their text, chats by the group's name or the person
  • Apps, Senders, and Threads are tables now: sort by any column, drag columns to reorder or resize, and the layout is remembered

0.4.7

October 15, 2026
  • Messages notifications without a link open their conversation anyway, by the sender, the way Karui for iPhone does; Contacts access is asked for the first time
  • Mark as hides Read when nothing selected is unread, and greys out the category a selection already has
  • The inbox keeps everything from the last month instead of stopping at 3,000 notifications
  • Sync Now's status shows while something is selected too

0.4.6

October 14, 2026
  • A notification the iPhone reported before the Mac saw it no longer appears twice, and its link reaches the one row
  • Karui's diagnostics also go to the system log, for bug reports

0.4.5

October 14, 2026
  • Fixed a bug where some notifications would open the wrong deep link.

0.4.4

October 14, 2026
  • Fixed a bug where the Time column wouldn’t grow.
  • Simply selecting a notification in the list marks it as read.

0.4.3

October 14, 2026
  • The compact view's columns now run Category, App, Sender, Notification, Time by default, and the narrow ones stay narrow so the notification text has room; your own drag-and-drop layout is kept

0.4.2

October 14, 2026
  • Fixed automatic updates: earlier versions' updater could not run, so this one has to be installed by hand (download, replace Karui in Applications); updates work from here on
  • The Dock icon and the menu bar item show the unread count; turn it off under Settings
  • Sender has its own column in the compact view, sortable and movable like the others

0.4.1

October 14, 2026
  • Add an unread count badge and add a separate column for the sender.

0.4.0

October 14, 2026
  • Sync Now in the Notifications menu (⌘R) asks your iPhone to send its History right away and fetches the day's verdicts
  • A new app icon without the badge, so the Dock no longer looks like something is unread
  • The unread column can be moved like the others, and its place is remembered
  • Column widths leave more room for the notification text

0.3.1

October 14, 2026
  • Compact view is now a table: drag the headers to resize or reorder the columns, click one to sort, and Karui remembers it
  • Opening a notification puts its name in the title bar, with just Back, Mark as, and Delete above it
  • A Notifications menu with keyboard shortcuts: Mark as Read (⌘↩), Important, Neutral, Spam (⌘1–3), and Delete (⌘⌫)
  • The Help menu opens the Karui for Mac site and the bug report
  • View as is a button with a menu, and the toolbar's labels line up

0.3.0

October 14, 2026
  • History from your iPhone, with Karui's verdicts, viewed as a list, apps, senders, or threads
  • Mark read, change category, or delete on the Mac and the iPhone follows; deletes can be undone
  • Compact view, search, filters, and a Full Disk Access card that explains the + button
  • Alerts for senders you've written to, via the iPhone's Karui for Mac settings

0.2.0

October 14, 2026
  • Initial release: clear Karui alerts you've already read on your Mac and make Messages, Slack and Spark notifications open the correct thread on iPhone.

← Karui for iPhone