# Preview not working on Macs **URL:** \ **Category:** Developing with Prismic\ **Tags:** php\ **Created:** [March 12, 2021, 6:27pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509 "2021-03-12T18:27:58Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![long](https://avatars.discourse-cdn.com/v4/letter/l/e47774/32.png) [@long](https://community.prismic.io/u/long)\ **Post date:** [March 12, 2021, 6:27pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/1 "2021-03-12T18:27:58Z")
Hi, When loading a Preview on any browser on a Mac, the toolbar /edit pencil icon does not show up. On a Windows PC it works ok. I have the same issue as this post here - [{repoURL}/toolbar/state is returning a 404; Previews not working - #9 by Phil](https://community.prismic.io/t/repourl-toolbar-state-is-returning-a-404-previews-not-working/4463/9) So do you need to make the same fix in my repo ? Thanks. ---
**Author:** ![long](https://avatars.discourse-cdn.com/v4/letter/l/e47774/32.png) [@long](https://community.prismic.io/u/long)\ **Post date:** [March 12, 2021, 6:40pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/2 "2021-03-12T18:40:56Z")
Just an update. The Preview now does not work on PCs either. One additional error I see is: iframe.html:16 Uncaught Error: Unexpected message received by the iframe: [object MessageEvent]. Expected setup\_port at Object.initialisationMessageHandler (iframe.html:16) at iframe.html:16 [10:38](https://plainjoestudios.slack.com/archives/D7KT6ELAG/p1615574313029700) from [Prismic Toolbar iFrame](https://museumofthebible.prismic.io/prismic-toolbar/4.0.5/iframe.html) ---
**Author:** ![Phil](https://dub1.discourse-cdn.com/flex013/user_avatar/community.prismic.io/phil/32/14_2.png) [@Phil](https://community.prismic.io/u/Phil)\ **Post date:** [March 16, 2021, 11:54am UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/4 "2021-03-16T11:54:58Z")
Hi Long Pham, Can you give me the name of your repo so I can check this? Thanks. ---
**Author:** ![long](https://avatars.discourse-cdn.com/v4/letter/l/e47774/32.png) [@long](https://community.prismic.io/u/long)\ **Post date:** [March 16, 2021, 2:51pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/5 "2021-03-16T14:51:50Z")
Hi Phil, The name is museumofthebible. Thanks. ---
**Author:** ![Phil](https://dub1.discourse-cdn.com/flex013/user_avatar/community.prismic.io/phil/32/14_2.png) [@Phil](https://community.prismic.io/u/Phil)\ **Post date:** [March 16, 2021, 2:53pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/6 "2021-03-16T14:53:04Z")
Can you check this now? ---
**Author:** ![long](https://avatars.discourse-cdn.com/v4/letter/l/e47774/32.png) [@long](https://community.prismic.io/u/long)\ **Post date:** [March 16, 2021, 3:15pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/7 "2021-03-16T15:15:10Z")
It seems to be working but for one of the new custom type, we are seeing a 404 page, but the 404 page has the preview toolbar. Here is the custom type page - [https://museumofthebible.prismic.io/masks/location\_site.json/](https://museumofthebible.prismic.io/masks/location_site.json/) ---
**Author:** ![Phil](https://dub1.discourse-cdn.com/flex013/user_avatar/community.prismic.io/phil/32/14_2.png) [@Phil](https://community.prismic.io/u/Phil)\ **Post date:** [March 16, 2021, 3:23pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/8 "2021-03-16T15:23:31Z")
I don't understand, where are you seeing the 404? ---
**Author:** ![long](https://avatars.discourse-cdn.com/v4/letter/l/e47774/32.png) [@long](https://community.prismic.io/u/long)\ **Post date:** [March 16, 2021, 3:36pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/9 "2021-03-16T15:36:22Z")
Sorry for the confusion, if you go to [https://museumofthebible.prismic.io/documents~b=working&c=unclassified&l=en-us/YEGBCRIAACYAbyoE/](https://museumofthebible.prismic.io/documents~b=working&c=unclassified&l=en-us/YEGBCRIAACYAbyoE/) and click on Preview, you end up on a 404 page. ---
**Author:** ![Phil](https://dub1.discourse-cdn.com/flex013/user_avatar/community.prismic.io/phil/32/14_2.png) [@Phil](https://community.prismic.io/u/Phil)\ **Post date:** [March 16, 2021, 3:46pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/10 "2021-03-16T15:46:15Z")
OK, it sounds like you haven't updated your link resolver to process the new custom type. You can check this and other common preview issues here: > **[Troubleshooting: Previews](https://user-guides.prismic.io/en/articles/3403530-troubleshooting-previews)** > > Are your Prismic previews not working? Here we'll show you some common checks to get your previews up and running again. ---
**Author:** ![long](https://avatars.discourse-cdn.com/v4/letter/l/e47774/32.png) [@long](https://community.prismic.io/u/long)\ **Post date:** [March 16, 2021, 4:01pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/11 "2021-03-16T16:01:40Z")
Ok, yes, I see the problem there. Thanks. Also, the preview toolbar is not showing up on a Mac in Safari. Chrome is working now. I tried this in the incognito mode of Safari. ---
**Author:** ![Phil](https://dub1.discourse-cdn.com/flex013/user_avatar/community.prismic.io/phil/32/14_2.png) [@Phil](https://community.prismic.io/u/Phil)\ **Post date:** [March 16, 2021, 4:05pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/12 "2021-03-16T16:05:16Z")
It won't show up on a browser on which you're not signed in to Prismic. ---
**Author:** ![long](https://avatars.discourse-cdn.com/v4/letter/l/e47774/32.png) [@long](https://community.prismic.io/u/long)\ **Post date:** [March 16, 2021, 4:24pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/13 "2021-03-16T16:24:27Z")
I'm signed into Prismic in another tab. I tried this on an incognito window as well as a regular window as well. ---
**Author:** ![Phil](https://dub1.discourse-cdn.com/flex013/user_avatar/community.prismic.io/phil/32/14_2.png) [@Phil](https://community.prismic.io/u/Phil)\ **Post date:** [March 16, 2021, 4:57pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/14 "2021-03-16T16:57:27Z")
If your previews are working everywhere, but not in Safari, then the issue is an easy fix. Safari released an update that blocks cross-site cookies. Our preview system uses these cross site cookies to build the previews on top of your web app, so you will need access your Safari preferences \> navigate to the privacy tab \> deselect 'Prevent cross-site tracking'. [![](https://europe1.discourse-cdn.com/flex013/uploads/prismic/original/2X/1/18b0f0f388dcceeeca2c9ce1e8124c20a903afcc.png)](https://downloads.intercomcdn.com/i/o/182102886/4188b8bb572ae532485ef496/Screenshot+2020-02-04+at+16.09.08.png) ---
**Author:** ![long](https://avatars.discourse-cdn.com/v4/letter/l/e47774/32.png) [@long](https://community.prismic.io/u/long)\ **Post date:** [March 16, 2021, 6:17pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/15 "2021-03-16T18:17:21Z")
That works, Thanks ! ---
**Author:** ![system](https://dub1.discourse-cdn.com/flex013/user_avatar/community.prismic.io/system/32/1746_2.png) [@system](https://community.prismic.io/u/system)\ **Post date:** [March 17, 2021, 6:18pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/16 "2021-03-17T18:18:10Z")
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**Author:** ![system](https://dub1.discourse-cdn.com/flex013/user_avatar/community.prismic.io/system/32/1746_2.png) [@system](https://community.prismic.io/u/system)\ **Post date:** [December 9, 2021, 4:38pm UTC](https://community.prismic.io/t/preview-not-working-on-macs/4509/17 "2021-12-09T16:38:26Z")