Local keeps warning that Mailpit v1.12 is missing. I’ve attempted to apply the fixes to manually install Mailpit 1.24.1, downloaded a fresh version of Local replacing the local executable. Nothing resolves the error, despite Mailpit existing in the lightning-services folder.
I’ve encountered this issue on two separate Macs running Apple Silicon.
local-lightning.log (149.1 KB)
Nick-B
October 15, 2025, 4:15pm
2
Hey @travislopes ! Is this happening on newly created sites? Or when you try to start a site you already had in Local previously?
@Nick-B It occurs with existing and newly created sites.
On the site I created just to test this, it prompted the “Missing Mailpit v1.24” warning. Previously created sites prompt for “Missing Mailpit v1.12”.
Nick-B
October 16, 2025, 7:11pm
4
As a test could you check if you still get the issue on our new Beta release for 9.2.9?
Mailpit works successfully in the new site I created in Local 9.2.9 (Beta).
nickc
October 17, 2025, 9:41am
7
Thanks for the reply, @travislopes . You could try this to solve the message about 1.12 with your current main version of Local:
Thanks for clarifying, @sccr410 .
The port conflict sounds like you might have running services left over from previous Local launches. Mailpit failing to launch even after you’ve removed the old Mailpit files could be a versioning issue.
You can try this to fix both:
Quit Local.
Open Activity Monitor and quit any running nginx processes.
Take a backup of Local’s ~/Library/Application Support/Local/sites.json.
Update Local’s ~/Library/Application Support/Local/sites.json and make sure all Mai…
nickc
October 17, 2025, 10:40am
8
Also important to fully clear the old Intel mailpit folder and restart Local so it’s recreated with the Apple Silicon binary if you still see messages about missing Mailpit 1.24.1.
Thanks for sharing your sites.json, @sebastian . It looks correct to me.
One thing you can try is to force Local to recopy the mailpit binary on startup (steps below assume macOS, Windows users reading this should follow these instructions instead ).
Stop any running sites.
Quit Local.
Open the Finder and choose Go → Go To Folder…
Enter ~/Library/Application Support/Local/lightning-services and press Enter.
Delete the folder named ‘mailpit-1.24.1+0’, but leave the Finder window open.
Make sure …
1 Like
g_dub
October 29, 2025, 6:10pm
9
FYI this issue now pops up ‘per version’. I have several LocalWP sites that match the PHP/MySQL/WP versions on PROD. I followed the solution to fix the v1.24 issue but now I get the v1.12 error on an older site. Not a big deal as I can fix it each time I restart the site…
local-lightning.log (920.6 KB)
nickc
October 31, 2025, 10:17am
10
@g_dub For the 1.12 error, updating your versions to 1.24.1 in sites.json usually helps:
Thanks for clarifying, @sccr410 .
The port conflict sounds like you might have running services left over from previous Local launches. Mailpit failing to launch even after you’ve removed the old Mailpit files could be a versioning issue.
You can try this to fix both:
Quit Local.
Open Activity Monitor and quit any running nginx processes.
Take a backup of Local’s ~/Library/Application Support/Local/sites.json.
Update Local’s ~/Library/Application Support/Local/sites.json and make sure all Mai…
1 Like
g_dub
November 2, 2025, 4:08am
11
worked great! Thx for the link.
Gary
2 Likes