Amacsoft JPG to PDF for Mac is a PDF conversion tool. It was designed to let you convert your JPG or JPEG image files into PDF files. You can load individual files or choose an entire folder with JPG files and the application will turn every single file into a separate PDF file. If you want to include all the image files that you loaded into a single file, you can check the "Merge into one file" box. This will create a single PDF file with all your images. According to the application specifications, the quality of your images will be kept when you convert them.
When you load your images, they will be listed on the main screen and their name and size will be shown next to each image. You can double click on the "output name" field to change the name of the PDF file that will be converted.
There aren't many things that you can change about the conversion process. In fact, all you can do is change the name of the files and the output location on your hard drive. There is no way to customize how the images will be shown in the PDF file.
To test the application, I loaded 15 images and converted them into a single PDF file. The process took less than a second and the resulting file was opened just fine by Skim. I could browse the images quite smoothly and each page had one image on it.