Slack Not Opening on Desktop (Mac and Windows)

How to fix it

// try these in order, the most common fix is first

1. FIX 1Fully quit Slack and relaunch

   Copy steps
   1. 01Windows: open Task Manager, end every Slack process
   2. 02Mac: Activity Monitor, quit all Slack processes
   3. 03Open Slack again
   Did this fix it? Yes No

2. FIX 2Check Slack's status page

   1. 01Visit slack-status.com and look for an active incident
   Did this fix it? Yes No

3. FIX 3Clear the cache

   1. 01If Slack opens at all, choose Help > Troubleshooting > Clear Cache and Restart
   Did this fix it? Yes No

4. FIX 4Repair or reinstall

   Copy steps
   1. 01Windows Store build: open App settings for Slack and choose Repair, then Reset
   2. 02If it still fails, uninstall the Store version and install the Direct Download version from slack.com/downloads
   3. 03Mac: download the latest installer and replace Slack in Applications
   Did this fix it? Yes No

5. FIX 5Use Slack in the browser meanwhile

   1. 01Sign in at your workspace URL in Chrome, Edge or Safari to keep working
   Did this fix it? Yes No

Symptoms

Clicking the Slack icon does nothing, the window flashes and closes, or Slack opens to a blank window.

Why it happens

• C-01A leftover Slack process from a previous session blocking a new launch
• C-02Corrupted cache
• C-03A broken or outdated install
• C-04The Microsoft Store build misbehaving
• C-05Citrix environments, where Slack can fail to load because of incompatible third-party DLLs
• C-06A Slack incident

// this guide also covers

• slack not opening
• slack won't open
• slack not opening on desktop
• slack app not opening windows 11

The same problem in other apps

All crashes, freezes & blank screens guides →

• Teams Screen Sharing Shows a Black Screen (Microsoft Teams)
• Discord Screen Share Black Screen or No Audio (Discord)

Other Slack errors

• Slack Notifications Not Working on Desktop
• Slack Notifications Not Working on iPhone or Android
• Slack Not Loading or Can't Connect
• Slack Blank or White Screen on Desktop
• Slack Huddles Audio Not Working
• Slack Screen Share Not Working in Huddles
• Slack Huddle Camera Not Working
• Slack Messages Not Sending