Every release, in plain English.
Locker 0.5.17
August 2026LatestThree places where the app looked frozen because it was waiting on the AI.
Nothing waits for the whole mailbox to be sorted anymore
- The on-device AI sorts one message at a time, and three parts of Locker waited for all of it to finish before responding — so on a fresh mailbox they sat there for minutes with a spinner and no explanation, which is indistinguishable from a crash.
- Importing mail fetched your messages and then sorted up to 500 of them before finishing. It now completes as soon as your mail is in, and sorting continues in the background.
- “Sort with AI” did up to 500 in one go. It now does a batch that finishes in seconds and tells you how many are left. Preparing search ran over the whole mailbox with everything else waiting on it; it now runs on its own.
Locker 0.5.17
August 2026LatestImporting mail no longer waits for everything to be sorted first.
Import finishes when your mail is in
- “Import the last 100 messages” fetched your mail, then sorted every message with the on-device AI before it would finish — one at a time, up to 500 of them. On a fresh import that meant minutes of a spinning button with nothing to show, and it looked like it had hung.
- Import now finishes as soon as your mail is in, and sorting carries on in the background. Messages appear straight away and organize themselves over the next minute or two.
Locker 0.5.16
August 2026LatestRemoving an Apple Mail account could hang forever.
Nothing capped how long Locker would wait on Apple Mail
- Apple Mail is a normal app doing its own work, and on first connect it downloads your entire mailbox. While it’s busy, Locker’s requests to it can take minutes or never come back at all — and nothing capped how long Locker would wait.
- One stuck request jammed everything behind it. Removing an account would sit on “Removing…” indefinitely, and restarting didn’t help because the whole thing started over.
- Every request to Apple Mail now gives up after 30 seconds and reports what happened, so a background sync can’t block something you’re actively trying to do. If you’re stuck right now: quit Apple Mail, then remove the account.
Locker 0.5.15
August 2026LatestTwo fixes for connecting accounts through Apple Mail.
Connecting one account no longer marks others as connected
- If you had two accounts in Apple Mail sharing a name — and Apple Mail calls every Gmail account “Google” by default — connecting one made the other appear connected too. It wasn’t. Locker was matching by Apple Mail’s account name rather than the email address.
- That left the second account stuck: it showed as connected so you couldn’t connect it, and no account actually existed so there was nothing to remove. Accounts are now matched by email address and tracked separately.
There’s a Disconnect button where you’d expect it
- A connected account was just the words “✓ Connected” with no way to undo it — the only route out was the account list further down the page, which nobody found. Each connected account now has a Disconnect button next to it.
Locker 0.5.14
August 2026LatestA brief network glitch could stop your mail syncing, for good.
Mail sync recovers by itself now
- If a sync failed even once — a closed laptop, hotel wifi, a momentary DNS hiccup — the account got marked as errored, and Locker then skipped it on every future check. It never tried again. Mail just stopped arriving, with nothing on screen to say why, until you restarted the app or hit Sync by hand.
- On my own machine a single failed lookup silently stopped a mailbox for five days. Fixed: an account that failed is now exactly the one Locker retries, so a temporary problem clears itself on the next check.
Advanced Protection
- If you use Google’s Advanced Protection Program, the normal IMAP setup can’t work: Google removes app passwords from those accounts entirely and only lets verified apps read your mail. There was no password for Locker to use, and nothing in the app explained why.
- There is a way in, and Locker already had it — it just wasn’t labelled for you. Add the account to Apple Mail, which Google does permit, then use “Connect through Apple Mail” in Locker. Locker reads and sends through it locally, and your mail still never leaves your Mac.
- The add-account screen now says this plainly instead of letting you discover it by failing.
“Work / Exchange account” is now “Connect through Apple Mail”
- It was only ever described as a work/Exchange feature, so nobody with a locked-down personal Gmail realised it applied to them. Same feature, honest name: it’s for any account that can’t use a plain IMAP password.
Fixed: work accounts stopped syncing in 0.5.11
- 0.5.11 stopped Locker launching Apple Mail in the background, which was right for almost everyone — they had no Apple Mail account and it was starting for nothing. But it over-corrected: accounts connected that way are read through Mail.app, so with Mail closed they quietly stopped updating. Locker now starts Mail only if you actually have an account connected through it.
Locker 0.5.13
August 2026LatestAttaching a file to an email now works. It never did before.
Attachments
- Clicking “Choose Files” in the compose window did nothing at all — no file picker, no error, nothing. That was true in every version of Locker, so attaching a file to an email has never actually been possible from the app.
- Fixed. There’s a proper file picker now, and a drop area you can drag files onto instead. Attached files are listed with their sizes, each with an × to remove it.
- Two separate size limits were also capping attachments at about 700 KB and rejecting anything larger without explanation. Those are lifted — up to 25 MB — and if you go over, Locker says so clearly and points you at an encrypted Locker Drop link instead of failing at the last moment.
Downloads and quitting
- Saving an attachment used to bounce you into a web browser to fetch it from Locker’s own local server. It now downloads inside Locker, straight to your Downloads folder, and is revealed in Finder — no browser, and you don’t lose the page you were on. Links that genuinely point at the web still open in your real browser, as they should.
- Force-quitting Locker used to leave its background helper running — one extra every time, quietly holding system resources. It now shuts them down however the app exits.
Locker 0.5.12
August 2026LatestSending from the compose window was broken. It isn't now.
Send
- Writing a new message and hitting Send showed “This page couldn’t load” and the email never went anywhere. It happened every time, on every message, since 0.5.6 — when the “sending in 5…” countdown reached zero, the app crashed itself before the send request was ever made.
- Fixed. Undo Send works exactly as before, it just no longer takes the app down with it.
- And if a screen does fail in future you now get a real error message, a working “Try again” and a way back — instead of a blank page and a Reload button that repeats the same crash.
There’s a New Message button
- Writing a fresh email had no visible entry point unless you were on the Inbox screen or knew the ⌘N shortcut. There’s now a New Message button at the top of the sidebar, on every screen.
Search was running on 2% of your mail
- Locker builds a small on-device index so you can search by meaning rather than keywords. That index had quietly stopped building: a number it stores to detect changed messages could overflow the column it lives in, and reading it back failed — before any new messages could be added. One bad row froze the whole index.
- On a 1,046-message mailbox it had indexed 21. Search was matching against almost nothing, which is why results felt random and included obviously unrelated senders.
- Fixed, and the index rebuilds itself on next launch — that same mailbox went from 21 indexed to 740 in under a minute, and “my flight” now returns airlines and itineraries instead of noise.
Clicking a section no longer looks like a freeze
- Subscriptions took about twelve seconds to open, because it re-scanned your recent mail with the on-device AI before drawing anything. It now shows what it already knows straight away and scans in the background — 0.1 seconds instead of 12.
- Every section shows a loading indicator the moment you click it. Before, a slow page gave no feedback at all, so it looked like nothing had happened, and clicking again only queued up more work.
Locker 0.5.11
August 2026Three things that were quietly wrong for a long time.
Locker no longer opens Apple Mail
- Locker was starting Apple Mail in the background a few seconds after launch, and again on every sync — for everyone, whether or not they used it. If your only account was Gmail, or Proton via Bridge, a whole second mail client was booting behind your back and doing nothing.
- It now only touches Apple Mail if you’ve connected a work account that lives there, and even then only when Mail is already open. It will never start it for you.
Buttons that ask “are you sure?” now work
- Remove an account, delete an email, block a sender, revoke a token, delete a rule or tool, disconnect an integration — all of these asked for confirmation, and the confirmation never appeared. The click did nothing, silently. If you ever clicked one and nothing happened, this was why.
AI replies are written by you, not by the person you’re replying to
- Drafted replies were written from the sender’s point of view — greeting you by your own name and signing off as them. The model was shown the email and asked for a reply, but was never told who you are, so it wrote as the only person it could see.
- Replies also invented things: claiming to have investigated something it hadn’t, or turning a date like “the 2nd” into “July 2nd” in a billing reply. They no longer do that, and drafts no longer arrive with From:/Subject: lines pasted on top or a duplicate signature at the bottom.
Locker 0.5.10
August 2026AI replies were being written by the wrong person.
Replies are now written as you
- Drafted replies were coming out from the sender’s point of view — greeting you by your own name and signing off as the person you were replying to. Reply to an email from Sam and you’d get “Hi you, … Sam”.
- The cause was embarrassingly simple: the on-device model was shown the email and asked for a reply, but never told who you are. The only name it could see was the sender’s, so it wrote as them. Locker now tells it whose reply it’s writing.
- Drafts were also arriving with From: and Subject: lines pasted at the top of the body — the model mirroring the shape of its own prompt. The prompt no longer looks like an email header, and any that slip through are stripped.
mailto: links open Locker, not Apple Mail
- Clicking a mailto: link inside an email — an unsubscribe address, a contact in a signature — either did nothing and showed “This page couldn’t load”, or handed the message to Apple Mail. Locker is your mail client; sending you to another one was absurd.
- These now open Locker’s own composer with the recipient, subject and body already filled in. Web links still open in your browser, and schemes like tel: go to whichever app handles them instead of failing silently.
Locker 0.5.9
August 2026Connecting a mail server no longer depends on you knowing what its port speaks.
TLS mode is worked out for you
- Mail ports come in two styles: encrypted from the first byte (usually 993), or starting in plain text and upgrading a moment later — STARTTLS (usually 143, or 1143 for Proton Mail Bridge). Tick the wrong one and the connection just fails.
- Locker now tries the other style automatically when the first attempt fails for that reason, and remembers whichever one worked. The “Use TLS” checkbox is a hint now, not something you have to get right.
- This is exactly what stopped Proton Mail Bridge connecting in 0.5.8 — Bridge uses STARTTLS on 1143, but “Use TLS” is ticked by default because that’s right for nearly every hosted provider.
A readable error instead of a wall of OpenSSL
- Getting this wrong used to produce “error:0A00010B:SSL routines:tls_validate_record_header:wrong version number”, which helps nobody. If a connection genuinely can’t be made, Locker now explains what to check.
Locker 0.5.8
August 2026Proton Mail Bridge now connects.
Proton Mail
- Proton Mail Bridge accounts couldn’t connect at all. Bridge runs on your own machine and secures itself with a self-signed certificate — macOS trusts it, which is why Apple Mail works with it, but Locker’s mail engine kept its own separate list of trusted authorities and turned it away.
- Locker now trusts certificates from bridges running on your own machine (127.0.0.1 / localhost) — traffic that never touches a network, so there’s nothing to intercept. Connections to real mail servers like Gmail, Fastmail and iCloud are verified exactly as strictly as before. Applies to receiving and sending, and to any local mail bridge, not just Proton’s.
- To connect: install Proton Mail Bridge, keep it running, then add a Custom IMAP account with the host, ports and password Bridge shows you — typically 127.0.0.1, IMAP 1143, SMTP 1025. Use the password Bridge generates, not your Proton account password. (Bridge needs a paid Proton plan; free Proton has no IMAP.)
Also
- The add-account screen now spells out those Bridge ports and the Bridge-generated password, instead of leaving you to guess.
Locker 0.5.7
July 2026A cleaner reply, and the basics.
Replies don't shout at you
- Replying no longer dumps the whole original email into the box as raw quoted text. You get a clean space to write, with the original tucked behind a “••• quoted text” toggle (still sent).
About + Help
- An About window with the version number, and a Help menu (support + keyboard shortcuts). ⌘N starts a new message.
Fixed
- Send big files straight from compose via an encrypted Locker Drop link. And the Send buttons no longer get cut off in a small window.
Locker 0.5.6
July 2026Compose, leveled up.
Undo Send
- Hit send, then get a few seconds to catch it — a quick Undo before the message actually leaves.
Send Later
- Schedule a message for in an hour, this evening, or tomorrow morning. It waits in Drafts and goes out on its own.
Choose who you send as
- A From picker — if you run multiple domains on one account, pick which address a message goes out as.
Fixed + polished
- Forwarding now keeps the original's attachments (it used to drop them). Start typing a recipient and Locker suggests people you've emailed.
Locker 0.5.5
July 2026Fixes a launch crash.
Fixed
- Fixed a crash on launch in 0.5.3–0.5.4 (the app couldn't find its updater component). If Locker wouldn't open, this version fixes it.
Locker 0.5.4
July 2026A quick one.
Maintenance
- A small under-the-hood update — and the first one that installs itself with a single click if you're on 0.5.3. Your mailboxes, license, and settings are untouched.
Locker 0.5.3
July 2026Updates that just… update.
One-click updates
- This is the last time you'll download a disk image and drag Locker to Applications. From here on, a new version downloads in the background and installs with a single “Install and Relaunch” — no dragging, no disk images. Your mailboxes, license, and settings stay exactly as they are.
Locker 0.5.2
July 2026Sending a big file? Skip the bounce.
Big-attachment helper
- Attach a file too big for most inboxes and Locker offers a one-click way to send it as an encrypted, self-destructing Locker Drop link instead — no size limit, decrypted right in the recipient's browser. It only shows up when it's actually useful.
Locker 0.5.1
July 2026Multiple domains on one account, and a cleaner connect.
Send from any of your addresses
- Run several domains off one mailbox (like Fastmail)? Add your other addresses under an account, and Locker replies from whichever one the message was sent to — so a note to hello@yourbrand.com is answered from hello@yourbrand.com, not your main login. It even suggests the addresses it already sees in your mail.
Fixed
- Connecting a mailbox that hiccups on the first try no longer leaves a phantom duplicate account (and any existing duplicates are cleaned up automatically). A mailbox that's already connected won't be added twice.
Locker 0.5.0
July 2026Try it free for 14 days — no card.
Free 14-day trial
- New here? Open Locker, enter your email, and the whole app is yours for 14 days — no credit card. You'll see the days left right in the app, and can upgrade to keep it forever whenever you're ready.
Clearer pricing
- The current offer — including any active discount — now shows inside Locker exactly as it does on the site, so you always see the real price before you buy.
Smoother setup
- Picking a provider (Gmail, iCloud, Fastmail, Yahoo) now clearly highlights your choice and fills in the right hints.
Locker 0.4.0
July 2026A real daily driver — steadier sync, notifications that respect you, and your own rules.
Rock-solid sync
- Fixed the bug that could leave a Gmail account stuck after a hiccup — Locker now retries and recovers accounts automatically instead of going quiet.
Attachments
- View, download, and send attachments on your Gmail accounts.
Work accounts (beta)
- Connect a work / Outlook / Microsoft 365 account that blocks IMAP by adding it through Apple Mail, locally on your Mac — no OAuth app, no admin approval. A very large corporate inbox can be slow to fill in (Apple Mail downloads the whole mailbox); best today for Gmail and smaller work mailboxes.
Reply the way you actually do
- Reply, Reply all, and Forward. Cc and Bcc. Replies thread properly in the other person's inbox.
- One-click copy of any address in an email — even ones buried in a forwarded chain.
Smart notifications
- Native banners only for what matters: an urgent message, a security alert, or your morning Brief. Set VIPs that always reach you, mute the noisy ones, pick quiet hours.
Rules + reminders
- Build your own rules — “when my biggest client emails about invoices → notify me.” Tag any email. Snooze with remind-me and get a banner back at 3pm or tomorrow.
Polish
- Per-account inbox view. “Search by meaning” now drives the command bar (and never archives by mistake). Faster and more native — now using Apple's own system fonts.
Locker 0.3.0
June 2026Search that understands what you mean.
New
- Search your inbox by meaning, not just keywords. Type “baby stuff” and Locker surfaces the Carter's order, the stroller sale, the daycare email — even when none contain the word “baby.” It runs entirely on your Mac.
- Locker picks its own network ports on launch, so it never collides with other apps.
Locker 0.2.0
June 2026New
- Automatic updates — Locker tells you when a new version is out and updates with a click; your mailboxes, license, and settings stay exactly as they are.
- A real command bar at the top of every screen — type plain English and Locker does it.
- Sent box — every reply you've approved, with a link back to the original.
Improved & fixed
- Paste (⌘V) works everywhere. Removing a mailbox is a clear button. The on-device AI stays warm instead of reloading per email. The top search bar is wired up. Marketing mail no longer shows under “needs you.”
Locker 0.1.0
June 2026First build
- Locker for Mac — a private AI inbox that runs on your own Mac. Sorted, answered, and protected by the Mac's on-device AI; nothing leaves your device. Signed & notarized by Apple.