https://dortania.github.io/OpenCore-Legacy-Patcher/
I'm running OS 10.13 on a 2008 MacBook right now (officially supports 10.11). Using: http://dosdude1.com/software.html It runs great, beyond 10.13 the OS seems to run slower tho.
It's not necessary at this point, because every App I use still supports 10.11 (including VS code). But knowing I can get several more years out of this Machine is nice.
Also, I did use dosdude's software to hack 10.13 on my 2009 MacBook and it ran like crap and the touchpad driver was total crap.
Apple is still supporting 2015 MacBooks with 4th gen processors.
Again, Apple is supporting their devices longer than anyone else.
Dosdude1's software runs great on this 2008 MacBook. It runs exactly like Apple made it. Touchpad is no different and all gestures work perfectly. Not sure what went wrong in your case.
>A 2015 MacBook can still run the newest OS.
Big freaking deal, a 2003 Athlon 64 machine can still run modern Linux distros. Until Microsoft went scorched earth with Windows 11, computers from 2006 could still run the most recent version of Windows. Apple has the SHORTEST OS support window for desktops and laptops overall. My 2009 Macbook can run Windows 10 21H1 (2021) but can only run up to 10.11 (2015). All of 6 years of OS support from Apple, but 12 from Microsoft and 13 from Linux.