Martin in Clean Code, it’s easier to maintain and extend and it’s not tied to a single pdf manipulation library but it tries to take advantage of strength points of all of them It has more features, it has a bigger team working on it (we are 2 now), it’s built trying to follow best practices from Joshua Bloch in Effective Java and Robert C. What are the advantages compare to the pdfsam-console?

PDFsam itself was/is working pretty well but maintenance was/is a bit of a hell so I made the choice, I started to rewrite the pdf manipulation logic with 5 years of experience on my shoulders and trying to keep a close eye on quality and best practices. I realized at some point that some of the design choices I made were unfortunate and the code base wasn’t inline with 2010 software development standards.

Ok, as many of you know I’ve been working on PDFsam for 6 years now and I realized at some point that the pdfsam-console (the component providing pdf manipulation capabilities to PDFsam) has some… mm… limitations. It’s a PDF manipulation layer written in Java. You are probably asking “What the heck is Sejda?”. Great news! After more then one year of development today we released Sejda!

Once PDF Split And Merge is successfully launched, you can set back Gatekeeper option to whatever you want.

Set “Allow applications downloaded from:” to “Anywhere” and confirm by pressing “Allow From Anywhere”.

Open Gatekeeper settings located in “System Preferences > Security & Privacy”.

Now, assuming you still want to install PDF Split And Merge even if you didn’t download it from the “safest and most reliable place”, what can you do? You have to: It does that by preventing you from launching apps that are not downloaded from the Mac App Store which is “The safest and most reliable place to download and install apps”. The issue is caused by a new feature of Mountain Lion and OS X Lion v10.7.5, called Gatekeeper which “help protect your Mac from malware and misbehaving apps downloaded from the Internet”. Some of you reported the “PDFsam is damaged and can’t be opened” error when trying to install the PDF Split And Merge dmg package.Īfter some investigation and users feedback I can finally write what is causing that.

Pdfsam developers