3 Replies Latest reply on Oct 30, 2014 3:59 AM by HansVanEijsden

    iMac 5K compatibility with Lr5


      I purchased the new iMac 5K and while all my pictures looked amazing in Lr after editing, they became very pixelated when exported.  Then when I imported into Wordpress, they became very blurry.  I used all the same settings I always have on my previous iMac.  Resizing on export to 670 pixels and 72 resolution.  I also resent the same pics through the same process on my old Mac and they were perfect.  Is there a compatibility issue with the new 5K and Lr5?

        • 1. Re: iMac 5K compatibility with Lr5
          Conrad C Adobe Community Professional & MVP

          I'm not using a 5K iMac, but it might not be a Lightroom problem. If you're still sending images up to your Wordpress site at 670 pixels and 72 ppi, you're exporting photos that are perfect...for your old, non-Retina screens. Retina displays range from 218–227 ppi on the Retina Macs to 326–401 ppi on the latest iPhones, so if you're still basing your pixel dimensions on 72 ppi that's not anywhere close to what you need. They will seem pixelated next to the higher resolution text and graphics around them.


          For a website to look good on a Retina display it should have what are called "2x" assets, in other words double the pixel dimensions across and down. If your old standard was 670 pixels across, for Retina displays the site needs images 1340 pixels across to be as sharp as the rest of the page.


          More info:

          A Guide To Retina Graphics For Your WordPress Theme

          (that's just a guide I found quickly using Google; there might be better links out there)


          bkg8830 wrote:


          I also resent the same pics through the same process on my old Mac and they were perfect.

          Just to be make sure we're going down the right road, are you saying the images exported from your old iMac looked perfect in Wordpress on both iMacs, or looked perfect in Wordpress only on the old iMac?

          • 2. Re: iMac 5K compatibility with Lr5
            bkg8830 Level 1

            Thank you Conrad!  I bet that's it.  I can't check tonight but will tomorrow.  Thanks a bunch

            • 3. Re: iMac 5K compatibility with Lr5
              HansVanEijsden Level 1

              And make sure you're running Wordpress on a server with ImageMagick enabled, else you will loose sharpness while Wordpress resizes your images: Wordpress forgets to sharpen images after resizing (which is always required of course).
              I wrote a plugin for that: Plugin: Sharpen your photos on WordPress with ImageMagick - Hans van Eijsden Photography

              It also checks if your webserver has ImageMagick enabled.