NOTE: This is for PhotoTools 2.0 ONLY, it will NOT work for version 2.5
To fix this issue, the following file will need to be downloaded. Please click here to download the file and follow the steps below.

Please make sure to close Apple Aperture so that it is not running
Go to the following location: Mac HD\Library\Application Support\Aperture\Plug-Ins
Move the [...]

The following cameras do not support shooting in bulb mode with DSLR Camera Remote. Unfortunately there is no way for us to add this functionality, as it is a limitation of the Canon EOS SDK which our product is build on top of.
1D Mark II
1Ds Mark II
1D Mark IIn
20D
30D
5D
Rebel XT/350D/Kiss Digital N
Rebel XTi/400D/Kiss Digital X