Why is preview for photos running slow in Mavericks?

You can't do any editing in Quicklook. It's merely meant for quickly peeping at what's inside the file.

I agree with the people that are considering, that if there are some improvements, Quicklook is still slooooower than it was with Lion. It's still not Quicklook, but Slowlook.

Same behavior when opening a folder like Application the first time during a session, the file icons are appearing one by one, when it was instant previously with Lion.

There are also some slight improvements in this area, but it's reallu not instant.

All of this is giving to the user a not some good user experience.

The system appears to be slow and not that responsive.

I was able to download 10.9.2 and it's (mostly) fixed the problem.

I can now view Canon RAW files with Quicklook; although, there are sometimes black squares across the image.

Not perfect but much better.

UPDATE:

Even though Preview is not near as fast as it was I am able to use Quicklook. That is good.

Since updating to 10.9.2 I have had two freezes in two days. I have NEVER had this before. I think I'll move back to 10.8.5........

I am seeing a marked improvement in the speed "quick look" launches. It's totally usable again. Thanks for the fix AND - it's crazy it took so long to address the issue. It's funny becasue it is not even mentioned in the description of the upgrade. Cheers - Back to work 🙂

EM

I think both programs are still poor and unusable for a solid workflow. Still needs to be fixed. Arc Soft photo viewer is what I'm currently using 🙂

Here's a screen shot of Arc Soft Photo Viewer. It's really quick, I just whittled down 400 images to 70, and there's even an excellent info pane you can toggle on or off. Even if they fix preview, I'm still using it. It's FREE right now 🙂

Glad it works well for you. I prefer Preview. It's also FREE.

Pete

Pete, preview is working well for you? What did you do? Are you using it with 300+ images loaded at once? I used it a ton in Mountain Lion...

Downgrade to 10.8.5 slove this problem.. It is only one solution for now. I am so happy now. Before I try update by dev 10.9.2 but no result. Mac preview is great app in combinaton whith ps6. I am using it for check image before editing in ps6 or delete (cmd+backspace) it is realy fast and productive. Usual I have a lot of RAW images (d600) in preview at once. Using another app like Arc Soft Photo Viewer is not bat idea easier than downgrade...

Wau, this ArcSoft is realy fast... Thanks jsoulful53!

Where is ArcSoft Photo Viewer? I go to the site and it has Photo+ for $9.99

Is that the one that is free?

The software you mentioned doesn't seem to be free.

Bummer! It was free for a limited time when I posted it. I actually paid for it a month or so ago... I think it was $9.99

Worth the $10 if your a photographer going through a lot of images. If you're a casual photographer going through a small amount of work, then it's not neccesary. Just hit your space bar for quick look, which seems to be relatively OK with the update 🙂