# Slack for video editors on Mac: file limits, huddles and review tips for 2026

> Slack for video editors on Mac: 1 GB file cap, huddle screen share limits, shortcuts, review threads and what to ask Lazur while you work.

URL: https://www.lazur.app/for/video-editors/slack
Updated: 2026-11-08

Slack for video editors on Mac covers chat, review threads and quick huddles well. Its limits matter more: files up to 1 GB, 10 files per drop and two people sharing a screen at once. This guide covers those limits, the Mac permission fix and the shortcuts that save time. It also shows what to ask Lazur while you stay in Slack.

## Quick answer

- Slack on Mac handles chat, review threads and short huddles well. Large media needs another route.
- Members and guests can add files up to 1 GB each, and you can drop up to 10 files into one message at once.
- Huddles allow two people to share their screen at a time, and drawing works only in the desktop app.
- The free plan shows only 90 days of messages and files, so download anything you need to keep.
- Lazur points, explains, guides and drafts while you work in Slack. It does not click buttons for you.

Slack on Mac is good for talk, review threads and short calls. It is not a file locker for large camera media. Slack help says members and guests can add files up to 1 GB each. You can drop up to 10 files into one message at once. Plan your sharing around those two limits.

![A video editor at a Mac laptop with a team chat open, the everyday setup for Slack for video editors on Mac](https://images.lazur.app/content-images/role-app/video-editors-slack/slack-for-video-editors-on-mac-1-8549e3.jpg)

## Why Slack fits an editing team on a Mac

Editing creates a lot of small messages. A producer asks for a cut. You post the link. A director replies in a thread with three notes and a question about colour. Slack keeps all of that in one place, so nobody digs through email for it.

The Mac app runs in its own window. Put it beside your editor in Split View, or on a second display. To tile a window, click and hold the green button at the top left, then pick a side. Your timeline stays visible while you read.

One channel per project works better than one big channel for everything. Name each channel after the client or the show. Keep general chatter in another channel, and keep cut reviews in the project channel where people expect them.

- **1 GB** Largest single file that members and guests can add to Slack, per Slack help ([source](https://slack.com/help/articles/201330736-Add-files-to-Slack))
- **10** Files you can add to one Slack message at once by dragging them into the message field ([source](https://slack.com/help/articles/201330736-Add-files-to-Slack))
- **2** People who can share their screen at the same time in a Slack huddle ([source](https://slack.com/help/articles/4402059015315-Use-huddles-in-Slack))
- **90 days** Message and file history that Slack's free plan lets you view and search ([source](https://slack.com/intl/en-fi/help/articles/115002422943-Message-file-and-app-limits-on-the-free-version-of-Slack))

## Slack file size limit on Mac for editors

Slack help says members and guests can add files up to 1 GB in size. Up to 10 files can be added to one message by dragging them into the message field. Those two numbers decide most of your sharing plans.

Camera clips, raw exports and project folders can all pass 1 GB. When a file is too big, Slack will not carry it. Send a smaller export or a link from a storage service instead. Then post the link in the thread, with the file name and the version.

Slack also says uploads can be limited in Slack Connect conversations. Those are shared channels with people from other companies, such as clients. Some file types cannot be added at all. Send a small test file to each client channel before a delivery day.

### Checklist before you drop files in a channel

1. Check each file size in Finder. Select the file and press ⌘I for Get Info.
2. Send no more than 10 files in one message.
3. Post a link for anything over 1 GB, with the file name and the timecode range.
4. Send a test file to a client channel before a delivery day.
5. Check the thread after you post, so you know every file arrived.

> **Watch for the folder drag:** Dragging a whole folder into the message field runs into the 10 file limit fast. Split large folders into batches of 10 or fewer, or post one link to a shared folder instead.

## Huddle screen sharing on Mac: the limits editors hit

Huddles are quick calls inside Slack. Slack help says the free plan allows two participants in a huddle. Paid plans allow up to 50 participants, and 25 of them can turn on video at once. A client review may need a paid plan.

Only two people can share their screen at a time. Drawing on a shared screen works only in the Slack desktop app for Mac and Windows. Slack's help article does not list drawing in the browser version, so use the desktop app for markup.

Prepare before the call. Post the cut you want to discuss in the channel. Decide who shares first, since two sharers is the cap. Then start the huddle. Your reviewer can follow along from the link you posted.

## Fixing the Mac screen recording permission bug in Slack

Some Mac users hit a bug in huddle screen sharing. It affects people who moved from the direct download of Slack to the Mac App Store version. Slack asks for screen recording access, even when System Settings already shows Slack as allowed. Toggling the switch does nothing.

1. Open System Settings, then go to Privacy & Security > Screen & System Audio Recording.
2. Remove Slack from the list, then add it back and turn it on.
3. Quit Slack, open it again, then try the share once more.
4. If the bug stays, uninstall the App Store version. Install the direct download from slack.com/downloads/mac.

Apple's Mac Help says each app can get screen recording, audio only, or both. Slack needs the screen recording setting for huddle sharing. Pick that option, not the audio one.

Slack's help article also lists a Terminal command that resets the permission. Run it only after the first two steps fail. The article gives no date or version for the bug, so check it again after each Slack update.

## Slack keyboard shortcuts for busy channels on Mac

⌘K opens the Quick Switcher. Type a channel or a person's name, then press Return. It beats scrolling the sidebar when you move between three projects in one afternoon.

⌘⇧A opens the Unreads view. Use it after a long render, when several channels have new messages. ⌘/ shows the full list of shortcuts, so you can see what else is there.

Learn two shortcuts per week. Trying all of them at once does not stick. For step-by-step help, read [how to jump to a conversation in Slack on Mac](https://www.lazur.app/how-to/jump-to-a-conversation-in-slack) and [how to show keyboard shortcuts in Slack on Mac](https://www.lazur.app/how-to/show-the-keyboard-shortcuts-list-in-slack).

## Review threads that stay readable for clients and producers

Put every note in a thread. One thread for each cut version keeps the notes together. Name the version in the first message, such as Cut 4 for the first full pass. Anyone who reads the channel later can follow it.

Use timecodes in every note. Write the hour, minute, second and frame, then the change. A note such as the timecode followed by lower the music under the interview is easy to act on. A note that says the music is too loud is not.

Pin the approved version once the client signs off. Pinned messages help people find the file they should use. Steps are in [how to pin a message in Slack on Mac](https://www.lazur.app/how-to/pin-a-message-in-slack). Reply inside the thread, not the main channel, using [how to reply in a thread in Slack on Mac](https://www.lazur.app/how-to/reply-in-a-thread-in-slack).

## Notifications during an export or a render

A render runs for a long time, and Slack will keep pinging you during it. Pause notifications for the render window, then unpause when the file is done. The steps are in [how to pause notifications in Slack on Mac](https://www.lazur.app/how-to/pause-notifications-in-slack).

![Video editing timeline on a monitor, the kind of footage that gets shared in Slack review threads](https://images.lazur.app/content-images/role-app/video-editors-slack/slack-for-video-editors-on-mac-2-8e9e09.jpg)

Mute the channels that do not need you. Keep the project channel and direct messages from your producer switched on. Mute the rest, then check them once the render is done. Steps are in [how to mute a channel in Slack on Mac](https://www.lazur.app/how-to/mute-a-channel-in-slack).

If alerts stop arriving, check Slack's settings and your Mac's Focus settings first. Then follow [how to fix Slack notifications not working on Mac](https://www.lazur.app/how-to/fix-missing-notifications-in-slack). Do not assume Slack is broken before you check Focus.

Set a status while you render. Say what you are doing and when you will reply. Your team stops expecting a fast answer. The steps are in [how to set status in Slack on Mac](https://www.lazur.app/how-to/set-your-status-in-slack).

## Free plan history: what disappears from Slack

The free plan shows only the last 90 days of messages and files. Older items are hidden. Slack help says messages and files more than one year old are permanently deleted.

That matters for editors. A client may ask for a file from last spring. On the free plan, that file may be hidden, and after a year it may be gone for good. Check your workspace before you promise a client an old asset.

Slack's pricing page lists Pro at $8.75 per user per month billed monthly, or $7.25 per user per month billed annually. Pro includes unlimited message history. Slack also advertises a limited-time 50% discount with separate terms, so read those terms before you count on it.

Before a project closes, download the files you need. Keep the final delivery in your own storage too. Slack should not be your only archive.

## Mistakes editors make with Slack on Mac

- Posting a review link to an old cut. Pin the current version and name it in every post.
- Trying to attach a file over 1 GB. Post a link instead.
- Relying on the free plan for a year of client history.
- Fixing screen sharing in the wrong order. Start with the permission switch, then reinstall.
- Sharing a client channel or private message on a shared screen without checking the window first.
- Leaving notifications on during a render, then reacting to every ping.

## Ask Lazur for help while you stay in Slack

Lazur is a voice assistant for the Mac. It lives in the notch. Hold ⌥⌘, which is Option and Command together, and ask about anything on your screen. Lazur answers out loud and helps you get the work done in any app.

Ask where something is and Lazur draws a circle and a label around it on your screen. That helps when an app moves a button after an update. Lazur points. It does not click for you.

Ask how to do something and Lazur guides you one click at a time. It waits for each click before it gives the next step. You stay in control of Slack the whole time.

## Dictation and drafting inside Slack for editors

Hold fn to dictate clean, formatted text at the cursor in any app. Dictation works in the Slack message field too. Use it for long thread replies, timecode notes or a message to a producer.

![Person typing a review note on a laptop at a desk during a project](https://images.lazur.app/content-images/role-app/video-editors-slack/slack-for-video-editors-on-mac-3-fc63dd.jpg)

Snippets hold text you type often, such as your delivery checklist. A personal dictionary keeps client codes and reel names spelled right. Clipboard slots hold the links you reuse, so you do not hunt for them.

Ask Lazur to draft a short update. Give it the facts: the version, the due time and what changed. Lazur drafts and types text. You read it, then press Send yourself.

## Research and vendor setup questions for review tools

Research runs in Lazur's own Chrome tabs, through the Lazur for Chrome extension. It comes back with a summary and a report. Use it for a long vendor setup guide you do not want to read in full.

Some teams link Slack to a review tool such as Frame.io. Its current setup steps and plan rules come from Frame.io's own help center. Check that page before you promise a client a feature.

## Privacy before you hold ⌥⌘ in a client project

Lazur listens and looks at the screen only while you hold the shortcut. Audio and the screenshot go to AI providers to answer you. They are not stored. Content is never used to train AI models.

> **Check the screen first:** Client footage, unreleased cuts and private messages may be on screen. Look at the window before you hold ⌥⌘. Close anything you should not share.

## Setting up Slack on Mac for a small editing team

Make one channel per client or show. Use private channels for work that needs tight control. The steps are in [how to create a channel in Slack on Mac](https://www.lazur.app/how-to/create-a-channel-in-slack).

Use search when you need an old note. The steps are in [how to search messages in Slack on Mac](https://www.lazur.app/how-to/search-messages-in-slack). Save a message you need later, such as a delivery spec, with [how to save a message for later in Slack on Mac](https://www.lazur.app/how-to/save-a-message-for-later-in-slack).

Set reminders on the notes you must act on. Slack reminders and Apple Reminders are separate. Steps for Slack are in [how to set a reminder in Slack on Mac](https://www.lazur.app/how-to/set-a-reminder-in-slack).

## Keeping Slack up to date on Mac for huddles

Slack's Mac release notes list version 4.53.280, dated November 3, 2026. Slack calls it a security release and recommends updating. Check the release notes page for the newest build before you update.

Updates can change how huddles and drawing behave. Test a short huddle with your producer after each update. Do it before a deadline, not during one.

## A first week plan with Slack on Mac

1. Day one: set up one channel for your current project, then pin the working cut.
2. Day two: check your largest file against the 1 GB limit and test a link workflow with one client.
3. Day three: fix the screen recording switch if huddle sharing fails.
4. Day four: set up notification pauses for render windows.
5. Day five: if you use the free plan, export anything you need before it passes the 90 day window.

Start small. Pick one shortcut, one thread habit and one file rule. Add the rest once those feel normal.

## With Lazur

Lazur is a voice assistant for the Mac that lives in the notch. Hold ⌥ ⌘ and ask; it sees your screen, answers out loud, points at buttons and walks you through apps. Hold fn to dictate. Free for 3 days, then $18/month: https://www.lazur.app/download

- “Why won't this export send to the client channel?”: Lazur explains the 1 GB file limit in plain words, then points at the message field so you can see where the link goes. (Explains what's on screen)
- “Where is the Threads view in Slack?”: Lazur draws a circle and a label around the Threads view on your screen. You still click it yourself.
- “Why won't this folder upload to the client channel?”: Lazur explains the 10 file limit per message and the 1 GB file cap, then suggests batches or a link.
- “Walk me through setting my status while I render.”: Lazur guides you one click at a time and waits for each click before it gives the next step.
- “Read this thread and tell me which notes are still open.”: Lazur reads the thread on your screen while you hold the shortcut, then lists the open notes out loud.
- “Dictate a reply: cut four is ready, lower the music under the interview.”: Hold fn and speak. Lazur types clean text at the cursor in the message field. You review it before you send.
- “Draft a delivery update with the version, the due time and the changes.”: Lazur drafts a short message from the facts you give. You read it and press Send yourself.
- “Remind me to check the client notes at four.”: Lazur adds the reminder to Apple Reminders. Slack reminders are separate, so set those in Slack if you need a Slack ping.
- “Look up the current Frame.io Slack setup guide and summarize it.”: Lazur runs the search in its own Chrome tabs and returns a summary and a report you can read later.
- “What does Slack's free plan keep for me?”: Lazur answers out loud. It covers the 90 day window, hidden older items and the one year deletion rule.

## FAQ

### Can Slack on Mac send a file bigger than 1 GB?

Slack help says members and guests can add files up to 1 GB. For bigger files, send a smaller export or post a link from a storage service. Check each file size in Finder with ⌘I before you drop it into a channel.

### How many files can I drop into one Slack message?

Slack help says you can add up to 10 files to one message by dragging them into the message field. For a bigger batch, split the files across several messages or post a shared folder link.

### Why does screen sharing fail on my Mac in Slack?

Slack's help article describes a bug for Mac users who moved from the direct download to the Mac App Store version. Fix it in System Settings > Privacy & Security > Screen & System Audio Recording, or reinstall the direct download from slack.com/downloads/mac.

### How many people can share their screen in a Slack huddle?

Two people can share their screen at a time, according to Slack help. Free huddles allow two participants. Paid plans allow up to 50 participants, and 25 can turn on video at once.

### Can I draw on a shared screen in the browser version of Slack?

Slack help says drawing on shared screens is supported only in the Slack desktop app for Mac and Windows. Use the desktop app when you need markup during a review.

### How long does Slack's free plan keep my files?

The free plan lets you view and search messages and files from the last 90 days. Older items are hidden. Slack help says messages and files more than one year old are permanently deleted.

### Does Lazur work inside Slack?

Lazur is a separate Mac app. It is not a plugin or add-in for Slack or any other app. It runs beside Slack on your Mac and answers questions about what is on your screen.

### Does Lazur send my Slack messages for me?

No. Lazur drafts and types text when you ask. You read the text and press Send yourself. Lazur does not click buttons or operate other apps for you.

### Is there a trial for Lazur?

Yes. Lazur has a 3-day Pro trial with no credit card. The trial starts when you first open the app. Pro costs $18 per month, or $15 per month billed annually, and includes 150 AI actions.

## Sources

1. [Add files to Slack](https://slack.com/help/articles/201330736-Add-files-to-Slack), Slack, checked 2026-11-08
2. [Use huddles in Slack](https://slack.com/help/articles/4402059015315-Use-huddles-in-Slack), Slack, checked 2026-11-08
3. [Troubleshoot huddles screen sharing bug on the Slack Mac desktop app](https://slack.com/help/articles/29407960918291-Troubleshoot-huddles-screen-sharing-bug-on-the-Slack-Mac-desktop-app), Slack, checked 2026-11-08
4. [Slack for Mac - Release Notes](https://slack.com/release-notes/mac), Slack, checked 2026-11-08
5. [Message, file, and app limits on the free version of Slack](https://slack.com/intl/en-fi/help/articles/115002422943-Message-file-and-app-limits-on-the-free-version-of-Slack), Slack, checked 2026-11-08
6. [Slack Pricing](https://slack.com/pricing), Slack, checked 2026-11-08
7. [Navigate Slack with your keyboard](https://slack.com/help/articles/115003340723-Navigate-Slack-with-your-keyboard), Slack, checked 2026-11-08
8. [Control access to screen and system audio recording on Mac - Apple Support](https://support.apple.com/guide/mac-help/control-access-screen-system-audio-recording-mchld6aa7d23/mac), Apple, checked 2026-11-08