I am a professional photographer.
I used the Macbook 12 m3 for quite some time with Lightroom. Now I got the max out 15 inch.
To be honest, I don't feel a perfomance boost as expected. It's a bit faster exporting images, but the diffence would never be worth so much more money.
That's very surprising to hear. How heavy are your edits in Lightroom?
I tend to find most machines cope ok with simple slider adjustments in the Develop module, including my old 11" Air, but it's more when stitching large panoramic or working on images which require a lot of localised edits with the brush tool that things become slow. I've several files that must have well over a couple hundred localised brush strokes from having to carefully mask of specific awkward shaped areas across the 36mp frame. They're a nightmare to work on. Even switching between two different snapshots of the same image (with just a difference in the position of the exposure slider between them) can sometimes take 5-10 seconds on my fully loaded 2012 iMac.
Same thing with another old image that was taken with a ridiculously dusty sensor. After spot removing about 150 spots(!) the image became a nightmare to work on. Needless to say I make sure the sensor is always clean these days!
That sort of stuff is the exception rather than the rule but it's those situations which are more telling with how well machines performs (or not, as the case may be) with Lightroom.
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