After the upgrade to 8GB on my aluminum MacBook (Late 2008) with the Samsung RAM was unsuccessful (beep or unstable operation), I have now tried this RAM from Kingston and lo and behold, it worked straight away and the Macbook is running properly and super stable! Thus, the memory is definitely from the first to use aluminum Macbook model without problems.
Highly recommended and it brings a noticeable speed increase, especially when working in parallel with multiple VMs.