Resizing photos in Big Sur Preview broken

[Bozzlabb]

Hi there,

since the installation of BigSur i cant resize pictures anymore with preview.

It worked perfectly in Catalina, the slider in BigSur is still there , but the changes dont have an effect to the size.


Am i the only one with this Issue and does someone have a workaround maybe ?


Cheers

 

[AdamJohnG]

Hi

I have the same problem, did you ever find a solution?

It has worked for me in every version of MacOS

Thanks

 

[Bozzlabb]

Unfortunately no , resizing pictures is so laborious now ..It was so easy before with the slider

 

[AdamJohnG]

Bit you have found another solution?

Luckily I have an older MBA with Mojave and have had to use that to make the photos 'lighter'

 

[Bozzlabb]

I dont found an easy solution as it was before .. Still cant understand why they worsen it ..

 

[rpmurray]

Still cant understand why they worsen it ..

Apple doesn't want to pay the going rate for skilled programmers so they cried to the government about not being able to find enough "qualified programmers" (code words for programmers willing to work cheap) and got them to raise the H-1B cap. And you can see the results in macOS and its built-in apps. They have all their high-skilled coders working on iOS because that's the cash cow that keeps the dollars flowing.

 

[fisherking]

there must be a reason why it's not working for some of you (as it's worked all along here, and works for most). can you try moving the image you're trying to resize? ie if it's in a folder, move it to the desktop, try again? anyway, maybe others here have suggestions... but it should work.

 

[AdamJohnG]

there must be a reason why it's not working for some of you (as it's worked all along here, and works for most). can you try moving the image you're trying to resize? ie if it's in a folder, move it to the desktop, try again? anyway, maybe others here have suggestions... but it should work.

I think maybe it was originally worded wrong. It is not a problem to change the size of the photo - That still works. It is making an image less 'heavy' MBwise using the slider when you export the image, that does not now seem to work.

Please tell us if it works for you.

 

[fisherking]

I think maybe it was originally worded wrong. It is not a problem to change the size of the photo - That still works. It is making an image less 'heavy' MBwise using the slider when you export the image, that does not now seem to work.

Please tell us if it works for you.

ah, that IS a different thing.

i can change the value of the slider if i export to jpeg; works as advertised. try exporting to a different location (ie the desktop), see if that helps.

 

[AdamJohnG]

ah, that IS a different thing.

i can change the value of the slider if i export to jpeg; works as advertised. try exporting to a different location (ie the desktop), see if that helps.

I can change the value of the slider too, it just doesn't work. The size of the file remains the same. I have tried saving to the desktop and no joy: The actual file size does not change for me in the saved exported copy.

Can you confirm that this does work for you?

The original file is a .jpg and I export it using File>Export... then choose JPEG as the output format, then use the slider to lower the Quality - But the resulting file, even when saved to a different folder, stays the same as the original.

I have read quite a few people with this issue of BigSur so would be curious to learn if it works for you, and please tell me the version of BigSur you are running.

Thanks

 

[mikzn]

Can you confirm that this does work for you?

The original file is a .jpg and I export it using File>Export... then choose JPEG as the output format, then use the slider to lower the Quality - But the resulting file, even when saved to a different folder, stays the same as the original.

I have read quite a few people with this issue of BigSur so would be curious to learn if it works for you, and please tell me the version of BigSur you are running.

FWIW I just tried this and it works fine for me Big Sur 11.5 b3

Was able to move the slider to a lower quality jpeg file - tried on 2 separate files and both exported fine and were both exported as smaller files

I have seen other posts about this issue also - I think since Catalina ?

Maybe it is hardware related? I tested it on a rMBP 2015

 

[AdamJohnG]

FWIW I just tried this and it works fine for me Big Sur 11.5 b3

Was able to move the slider to a lower quality jpeg file - tried on 2 separate files and both exported fine and were both exported as smaller files

I have seen other posts about this issue also - I think since Catalina ?

Maybe it is hardware related? I tested it on a rMBP 2015

I am using a 2018 i5 MacMini. My current version is 11.3.1 - I will update later to 11.4, which is the latest I am offered in update. Where is 11.5 b3 coming from?

And thanks for the help!

 

[fisherking]

I can change the value of the slider too, it just doesn't work. The size of the file remains the same. I have tried saving to the desktop and no joy: The actual file size does not change for me in the saved exported copy.

Can you confirm that this does work for you?

The original file is a .jpg and I export it using File>Export... then choose JPEG as the output format, then use the slider to lower the Quality - But the resulting file, even when saved to a different folder, stays the same as the original.

I have read quite a few people with this issue of BigSur so would be curious to learn if it works for you, and please tell me the version of BigSur you are running.

Thanks

works here (12" 2016 macbook). took a small screenshot (102kb); resized it & saved (16kb)... OS 11.5 current public beta (but it's worked for me, on this macbook, thru every OS & public beta)

 

[chabig]

Are we talking about exporting pictures as jpegs, like this? That works for me (Big Sur 11.4), both the GUI and the exported images.

 

[fisherking]

Are we talking about exporting pictures as jpegs, like this? That works for me (Big Sur 11.4), both the GUI and the exported images.

View attachment 1794866

yes. so, wondering why it's not working for some people; there must be a common denominator...

 

[chabig]

the slider in BigSur is still there , but the changes dont have an effect to the size.

I can change the value of the slider too, it just doesn't work. The size of the file remains the same.

But the resulting file, even when saved to a different folder, stays the same as the original.

The most likely explanation for the file not shrinking is that it's already maximally compressed. You can't keep recursively compressing a file smaller and smaller. There is a minimum size. Try again using larger images.

 

[AdamJohnG]

Are we talking about exporting pictures as jpegs, like this? That works for me (Big Sur 11.4), both the GUI and the exported images.

View attachment 1794866

Are you exporting from jpeg to jpeg? and lowering the quality and the file size of the new jpeg is smaller than the original?

I have just updated to BigSur 11.4 and find that from png to jpeg, it will resize, but still will not from jpeg to jpeg.

 

[AdamJohnG]

The most likely explanation for the file not shrinking is that it's already maximally compressed. You can't keep recursively compressing a file smaller and smaller. There is a minimum size. Try again using larger images.

No, that I not it. I am starting with jpeg files circa 1400x800 and around 1.2MB and looking for a file size of about 350KB for a web page. It is never recursively compressing.

I have been doing this same work, from very similar original files, on a daily basis with Catalina, it always worked.

A workaround seems to be to go from jpeg to png and then png back to jpeg using the Quality Slider, then it will work as expected - Just inefficient and must be some quality loss with two format changes.

 

[fisherking]

my apologies here; i never resize jpgs in preview, only screenshots, ie pngs; (i do all other image work in affinity photo). jus now, i made a screenshot, exported to jpeg, then tried to resize that jpeg.. and the file size did not change.

so this is an issue; probably would have been helpful to more-clearly describe it in the original post; but yes, the problem is there.

 

[AdamJohnG]

my apologies here; i never resize jpgs in preview, only screenshots, ie pngs; (i do all other image work in affinity photo). jus now, i made a screenshot, exported to jpeg, then tried to resize that jpeg.. and the file size did not change.

so this is an issue; probably would have been helpful to more-clearly describe it in the original post; but yes, the problem is there.

Yes we could have further fine-tuned the issue. In the same way that you always go png to jpeg I always go jpeg to jpeg.

Shame there isn't just a 'Resize Option' so we don't have to make a pseudo 'Export' - The need to make graphic files smaller, specially for the web is a very frequent need.

Thanks for confirming this is a more wide spread problem. Will be interesting to see if anyone can get it to work - jpeg to jpeg - in BigSur, as I really struggle to believe that it is hardware related.

 

[mikzn]

Thanks for confirming this is a more wide spread problem. Will be interesting to see if anyone can get it to work - jpeg to jpeg - in BigSur, as I really struggle to believe that it is hardware related.

Where is 11.5 b3 coming from?

And thanks for the help!

Just tried this again .jpeg to .jpeg and I confirm I do have the same bug - my previous test was .jpg to .jpeg which strangely works fine

Where is 11.5 b3 coming from? - Apple Beta Program

 

[AdamJohnG]

Just tried this again .jpeg to .jpeg and I confirm I do have the same bug - my previous test was .jpg to .jpeg which strangely works fine

Strangely .jpg to .jpeg doesn't work for me. Though I think the only file difference is the extension name. Sometimes, for uniformity, I have just changed a .jpg to .jpeg without any problem afterwards.

Thanks anyway for confirming it is an issue and that, unfortunately, it does not yet seem to have been solved in 11.5

Perhaps, if part of a beta program, you can report the issue?