MacOS slow load (10 min) time

Hello. I have a 2017 iMac, 3ghz quad core i5 with 32G ram. Capable of running other large apps (video editing, etc).

Zwift regularly takes 10 mins to go from login to load and then another 3-5 mins to load a world.

What is the deal here? I’ve attempt reinstalls and all manner of other tips and tricks but clearly I’m missing something.

This sort of unreliable behavior makes me pick TrainerRoad (gasp!) and a podcast more often.

Does your Mac use a mechanical hard drive?

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Something definitely wrong here. What MacOS version are you running? Is yours one of the ones w/the ATI vid cards?

I was running Monterey (12) since last fall when it came out. The issue has been happening since at least that time, I’ve just been putting up with it (firing it up 30 minutes before events/races).

BUTL: … I just now finished an upgrade to macOS Ventura (13).

  • The first load took it’s normal 10 mins to login and 5 minutes to load the world.
  • I closed out.
  • I reopened now and it took 30s? to get to the Devices screen.

Something has changed between Monterey and Venture.

Graphics card is Radeon Pro 555 2 GB
Drive is mechanical, and probably a bit sluggish: APPLE HDD HTS541010A9E632 - but 15 minutes? That’s wacky.

My wife is using Zwift on a 2017 MacBook Pro (with SSD of course) running Ventura and load times are not remotely that bad. More like 1 minute. No noticeable difference from Monterey. Your system specs are all better aside from the mechanical drive. I’m not sure what else might be going on, but solid state storage is known to make a huge difference for Zwift. I wonder if the post install “Optimizing Your Mac” process might have been hitting the storage for a while.

Sounds like you have it sorted now. The only time it ever takes a while (1-2 minutes, not 10min) is when there is an update. Otherwise, it should be quick SSD or mechanical drive.


It always loads far quicker on subsequent attempts within the same session, that’s a red herring I’m afraid. 10mins is a direct result of your 5400rpm HDD which was very slow when it was new, let alone now. Your CPU isn’t particularly fast either.

You need an SSD.