Unresponsive Safari after awakening or restart on iMac

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Level 1

23 points

Unresponsive Safari after awakening or restart on iMac

After awakening or after restarting, and launching Safari, Safari does not respond for 3-4 minutes. Then at first it is very sluggish to accept typing into the Search bar. If Safari is then closed and reopened, it launches normally. But then if put to sleep and launched later in the day, it is again unresponsive for a long time.

This started about a week ago.

[Re-Titled by Moderator]

Original Title: Safari does not respond

iMac 24″, macOS 15.6

Posted on Aug 10, 2025 10:53 AM

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Answer 1

den.thed

Level 10

90,796 points

Aug 10, 2025 11:02 AM in response to vintage42

If you are coming an going during the day, disable "Automatic computer sleep" and only allow the display to turn off.

As a test

Turn On "Prevent automatic sleeping when display is off"

Set "Turn display off when inactive" to 5 or 10 minutes

Leave the iMac On and only allow the display(s) to turn Off

Do not manually Sleep from the Apple Drop Down menu

Shut Down the iMac when away for a day or more

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Answer 2

vintage42 Author

Level 1

23 points

Aug 12, 2025 4:32 AM in response to den.thed

I did that, and at night moved the cursor to the left edge to Sleep as usual.

Next morning it took just as long to initially start Safari. After that, if I closed Safari and put the computer to Sleep, Safari opened immediately after awakening and re-launching.

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Answer 3

vintage42 Author

Level 1

23 points

Aug 12, 2025 11:02 AM in response to vintage42

The problem seems to be related to how long the Sleep is. And now that I have prevented automatic sleeping when display is off, that is only screen Sleep.

Screen sleeping overnight, or even for a few hours, makes Safari very slow to open.

But once Safari is open, I can close it, use the curser to Sleep the screen, and then immediately awaken the screen and quickly launch Safari again.

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Unresponsive Safari after awakening or restart on iMac

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