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OSX Yosemite Signed DMG Rejection
DMG files signed with the existing method can still be run but when opening OSX will produce a warning complaining that the DMG files are 'damaged' and will refuse to open them. To open the DMG the user can still right click and select 'Open' but clearly avoiding this case is preferable.
Apple have enforced this new signature style quite abruptly which leads us to speculate that it may be countering security problems in the previous method.
The latest version of JWrapper supports Yosemite-style signing and DMGs built with it will open fine without any warnings.
Fixes and new File API
In the first of these JWrapper might fail to set up an app properly due to some issues around running HTTP proxy detection and a direct download attempt.
In the second reported issue JWrapper might import a system JRE which is of too low a version to unpack the app, depending on the system JRE version and the app class version this may cause the install to fail.
Stay tuned for more info about a new file API to easily ensure valid config files at all times.