This appears to be a possible Safari or macOS issue involving Telegram links after updating macOS 27.
The URL tg://resolve?domain= is a Telegram deep link designed to open a specific Telegram channel, group, or user in the Telegram app.
The message “There is no application set to open the URL” means macOS cannot find an application registered to handle that type of link.
Why might this happen when opening Safari?
Since the pop-ups appear when Safari launches and refer to Telegram channels associated with your bookmarks or tabs synced from your iPhone, one possibility is that Safari is attempting to restore or process links from a previous browsing session. Another possibility is that a website, redirect, or Safari extension is triggering these links. iCloud Tabs could also be relevant if the affected pages are being synchronized between devices. However, these are possible explanations, not confirmed causes.
The fact that the problem started after updating macOS 27 suggests a possible connection to the update, but it does not establish that macOS itself is responsible. I am not aware of a confirmed Apple acknowledgment or a specific fix for this exact issue.
I recommend trying the following steps in order.
1. Test whether Safari's session restoration is responsible.
Quit Safari using Command-Q.
Hold down the Shift key while reopening Safari to test whether the pop-ups stop when the previous session is not restored.
If the pop-ups stop, this suggests that session restoration may be involved. It is a diagnostic test, not necessarily a permanent fix. You can then review Safari >> Settings >> General >> Safari opens with to adjust how Safari opens.
2. Check your iCloud Tabs.
Open Safari, click the Sidebar button, and look under iCloud Tabs for your iPhone or other Apple devices. Close any suspicious Telegram-related tabs, then reopen Safari and test again.
Apple's guide: Use iCloud Tabs.
3. Temporarily disable Safari extensions.
Open Safari >> Settings >> Extensions and turn off the extensions. Quit and reopen Safari. If the pop-ups stop, re-enable extensions one at a time to identify whether one is responsible.
4. Test whether iCloud Safari syncing is involved.
Go to Apple menu >> System Settings >> your Apple Account >> iCloud. Locate Safari and temporarily turn off syncing if the option is available. Read any prompts carefully, then reopen Safari and test again.
If this resolves the issue, syncing or restored tabs may be involved, although that does not prove iCloud itself is faulty.
5. Check for macOS updates.
Go to Apple menu >> System Settings >> General >> Software Update and install any available updates. Restart your Mac and check whether the problem persists.
Apple's instructions: Update macOS on Mac.
6. Check Telegram's installation.
If you use Telegram, make sure its official app is installed and up to date. This may resolve the error about no application being available to open the link. However, it will not necessarily stop Safari from unexpectedly attempting to open Telegram links in the first place. The missing application and the unexpected triggering of links are two separate issues.
7. Contact Apple if the problem continues.
Report the issue through using the Product Feedback - and make it known to Apple regarding this ongoing issue, Include your exact macOS version and build, the full error message, and the fact that the pop-ups began after the update and appear when Safari launches. Mention that the URLs correspond to Telegram channels associated with Safari bookmarks or iCloud Tabs.
Will a future macOS update fix this?
Possibly. If the issue is caused by a bug introduced in macOS 27 or a change in Safari, Apple could address it in a subsequent update. However, there is currently no confirmed fix or release date for this specific problem, and the cause has not been established.
My recommendation is to start with Step 1. It is a quick, low-impact diagnostic test that can help determine whether Safari's session restoration is involved before you change your iCloud settings or install additional software.
