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Nik BhattKeymasterYou should be able to erase parts of the mask, but not add to it.
Nik BhattKeymasterNo, it should finish almost immediately once the model is downloaded. Does this happen for even a single image?
Nik BhattKeymasterSorry to hear about that. Sounds like the app is stuck waiting on something, but it’s hard to say what. You can delete preferences by doing the following:
1. Without Nitro running, open the Terminal
2. Execute the following command:
defaults delete com.gentlemencoders.nitro3. You can also go to the following folder in the Finder and delete the Data folder:
~/Library/Containers/com.gentlemencoders.nitro4. Reopen the app.
If you are still stuck, email support@gentlemencoders.com and I can help you.
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This reply was modified 2 weeks, 1 day ago by
Nik Bhatt.
Nik BhattKeymasterYes, adding quarter tones is on the list to do at some point. Thanks for the pointer to ACDSee Mac.
Nik BhattKeymasterHave you tried the Build Thumbnails command?
Nik BhattKeymasterI can’t speak to alternative software for UGreen. As far as alternative NAS, I have been gotten Synology to work (I don’t remember the model), a Raspberry Pi (!) and a Mac mini. So, a range of devices will work.
Nik BhattKeymasterAuto Advance only works when you are in the viewer (showing a filmstrip on the bottom). It does not auto advance when showing the thumbnail grid. Is that what you are seeing?
Nik BhattKeymasterNo, there isn’t a way to do that. Media Types are auto-detected by Apple’s code and they cannot be changed. I cannot even change the media type programmatically.
Nik BhattKeymasterThere may be a way for you to configure the NAS to work, since we have examples that do work, but since I don’t know why it doesn’t work for UGreen and others, I don’t know what to tell you 🙁
Nik BhattKeymasterSome NAS are not compatible with Nitro on iOS. For example, UGreen doesn’t work. However, Synology works, as does something as basic as a Raspberry Pi. Unfortunately, I don’t know why UGreen and others don’t work. I have talked to UGreen. I have talked to Apple’s engineers. No one seems to know. The reason it doesn’t work is because Nitro reads entire folders, not individual files, and the NAS are not able to provide a list of files. On Mac, this is not an issue – it’s the way the iOS works.
Nik BhattKeymasterYours is the first complaint I have received about color or luminance masking. I would need more information, sample images, etc. to look into the issue. It is not a magic wand selector. In general, I view color and luminance masking as a quick starting point, where you use the eraser tool to remove areas you do not need.
Nik BhattKeymasterThe video description has an attachment for an image that you can download and use as a test target. The video also shows how to take images to use to train the lens corrector.
Yes, I’m looking into Lensfun.
Nik BhattKeymasterIf you take a sample image and follow the instructions, then it should create the necessary information to automatically correct images. It’s hard to tell based on your description what is not working. If you aren’t using the sample image approach (grid lines), then you can use a RAW+JPEG pair and try to match them, but that can be hard depending on how exact you want the correction. I’m hoping to add more lens profiles to the app in the future, but there is so much other stuff I have to do first…
Nik BhattKeymasterUnfortunately, Apple’s list includes all cameras they support, regardless of decoder version. They do not break out v9 separately and the v9 list remains quite small. I have a page on my own site which lists the v9 supported cameras: V9 Camera List
In addition, DNG files will work with v9, as long as the DNG is not linearized. ProRAW files are linearized, so they are not eligible for RAW v9.
October 10, 2026 at 7:31 am in reply to: Is Apple getting more serious about photography with macOS 27? #152218
Nik BhattKeymasterNo, that is a different thing. Are you using the purple and green fringe sliders? Those are designed to remove purple and green from high contrast edges but should not be affecting the overall image. of course, if you crank up the range slider, it can affect more of the image. You might try using a mask for the area you want to correct and use the CA sliders on the mask.
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This reply was modified 2 weeks, 1 day ago by
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