Reports of Safari specifically draining battery or slowing a Mac down after the Golden Gate update have shown up repeatedly, including from at least one owner of a 3-month-old MacBook Neo. Before assuming Safari itself regressed in macOS 27, it is worth running the one check that actually identifies the cause: almost all of these reports trace back to a single tab, not the browser.

What people are reporting

The pattern across forum threads is consistent: battery life noticeably worse specifically while using Safari, fans spinning up during ordinary browsing, and in some cases the Mac feeling warm even when no obviously heavy page is open. These reports have appeared both as part of broader post-upgrade battery complaints and as standalone "Safari specifically" reports, which is the more useful signal to act on.

Find the actual culprit with Activity Monitor

This is the single most useful step, and it takes under two minutes:

  1. Open Activity Monitor (Spotlight search, or Applications > Utilities).
  2. Click the Energy tab.
  3. Look for entries labeled Safari Web Content. Each open tab, or group of tabs, runs as its own process, so a single runaway tab shows up as its own line rather than being hidden inside "Safari" as a whole.
  4. Sort by Energy Impact and note which Safari Web Content entries sit at the top.

If one entry is dramatically higher than the rest, that is very likely your drain. Common causes inside a single tab: autoplaying video, a page running a script loop in the background, an ad network serving unusually heavy content, or a poorly coded site that never stops redrawing.

To confirm it, close tabs one at a time, or use Safari's Tab > Close Other Tabs to test in batches, and watch the Energy Impact number after each close.

Check that Tab Purging is working

Safari has a built-in feature, often referred to as Tab Purging, that automatically suspends inactive tabs so they stop consuming CPU and memory in the background. If this is not working as expected on your Mac:

  • Quit Safari completely with Command+Q, then reopen it while holding Shift to skip restoring your previous session's tabs. If the drain disappears, one of the restored tabs was the problem, and you can reopen them one at a time to find it.
  • A very large number of open tabs, even suspended ones, still carries some memory overhead. If you are routinely running 40 or more tabs, periodically closing out finished research sessions will help regardless of any specific bug.

Rule out extensions

Safari extensions run continuously in the background on every page you visit, and a poorly optimized one can create a drain that looks exactly like a Safari problem:

  1. Safari > Settings > Extensions.
  2. Turn off extensions one at a time, particularly any ad blockers, price trackers, or AI-writing assistants that need to scan every page you load.
  3. Check Energy Impact in Activity Monitor again after disabling each one.

Is this worse on MacBook Neo specifically?

The MacBook Neo runs an A18 Pro chip rather than an M-series chip, Apple's lowest-priced Mac to date. It is a capable chip, but it sits well below even the base M-series chips in sustained performance, which means the same busy tab or background process that an M4 shrugs off can show up as a more noticeable drain or more noticeable heat on a Neo. This is a difference in headroom, not evidence that Golden Gate treats the Neo differently from other Macs. The diagnosis steps above apply the same way regardless of which Mac you have; a Neo will just show the effect more readily.

What changed with the Golden Gate update

Separately from any single-tab issue, the first few days after any major macOS upgrade carry extra background load that affects every app, Safari included: Spotlight rebuilding its index, Photos re-analyzing your library, and iCloud re-syncing metadata. If your Safari drain started the same day as the upgrade and has eased since, that is almost certainly this, not Safari itself. See our battery drain diagnosis guide for how to confirm it and how long to expect it to last.

When to do a deeper Safari reset

If Activity Monitor does not point to a specific tab or extension, and the drain persists well outside the normal post-upgrade indexing window, a fuller reset is worth trying before assuming something is permanently wrong:

  1. Safari > Settings > Privacy, and clear website data for any sites you do not need to stay signed into.
  2. Safari > Settings > Advanced, and disable any developer or experimental features you are not actively using.
  3. Make sure macOS itself is current. See which macOS update your Mac needs, since Safari ships its own updates bundled with macOS point releases.
  4. If Safari continues to misbehave broadly, rather than in one identifiable tab, that is worth filing through Feedback Assistant with the specific site or workflow that triggers it.

A few more questions

Does Private Browsing help with this? No, Private Browsing changes privacy handling, not energy usage. A heavy tab drains the same amount of power whether it is in a private window or not.

Should I switch to Chrome instead? Independent testing consistently finds Safari more energy-efficient than Chrome on macOS for comparable workloads, so switching browsers to fix a drain issue is likely to make things worse, not better.

Is this related to the general Golden Gate battery drain reports? It can be the same underlying cause if your Mac is still within the first week after upgrading. If weeks have passed and the drain is isolated specifically to when Safari is open, it points to a tab or extension rather than the OS-level indexing work.

The short version

  • Safari-specific battery drain almost always traces back to one tab, not the browser itself. Activity Monitor's Energy tab, sorted and filtered to Safari Web Content entries, finds it in under two minutes.
  • Reopen Safari with Shift held to skip restoring tabs, and test extensions one at a time if no single tab is the cause.
  • A MacBook Neo will show the same underlying issue more visibly than an M-series Mac because it has less performance headroom, not because Golden Gate treats it differently.
  • If the drain started the same day you upgraded and is easing over time, it is most likely post-upgrade indexing, not Safari at all.