Not sure if I’m in the right forum page here, and a search didn’t show that this has been posted before, so…
I just upgraded Eagle to the latest version 5.4.0 and while the brd files for the PIC and STM core boards open fine, I get an error when trying to open the brd files for ain, din and dout. Error from Eagle is:
Eagle for Mac OS X can’t update file xxxxx (data structure is older than version 4.11)
I had the same problem. A workaround is to open them in the PC version and resave them. Then the mac version will open them. I used parallels to get the pc version, but you could probably use any of the emulators to do the same.
* The UI actually got worse. It runs a lot slower than 4.x on pretty much any Windows machine I tried it on (supposedly this is not the case on MacOS)
* The new drawing algorithm limits the selection of useful colors even further as most color combinations just lead to an unreadable mess.
* A lot of commands have been moved into popup menus that were not there on 4.x, which means a lot of extra mouse moving and clicking. That doesn’t really sound all that bad, but it’s incredibly annoying when you’re tweaking a layout and spend 30% of the time clicking menu items that weren’t necessary or even there at all before.