Mat77303 -You will still need to manually set :
<key>RtVariables</key>
<dict>
<key>CsrActiveConfig</key>
<string>0x65</string>
<key>BooterConfig</key>
<string>0x28</string>
</dict>
again in your config.plist file( note clover configurator will not do this for you only mount the EFI partition) - see post #53 –toleda- regarding clover 3253’s behavior on this issue. By the way you do not need kext-dev-mode=1 or rootless=0 anymore.
By the way be careful with clover configurator cause I also noticed when you save your config.plist file using it it may competley remove/replace the RtVariables section –guess cause if you check it’s RtVariables fields they were not meant for new CsrActiveConfig modifications implemented in clover 3253-only settings regarding Mac Models( eg Board id, Serial number, Hardware UUID etc). Its author will need to fix this in new releases.
So use a property list editor eg PlistEditPro or even simple text editor-to save the file ( see uee3fc's guide on how to do this if you don’t know how -post #26 of this thread). When I upgraded to DP5 which is almost technically identical to Beta 3 -(DP5 build 15A235d, Beta 3 build 15A235e), I did not even move custom kexts from S/L/E –just used the CsrActiveConfig=0x67 flag and everything went smooth. Moving kexts to L/E is a good idea to confirm/test their permissions. Although I don’t think leaving them in S/L/E will prevent you from making a successful upgrade. Does permission drwxr-xr-x@ 3 have same effect as drwxr-xr-x 3 ?- can some tell me?
Anyway just back up everything on a separate disk just in case something happens and if it works you will still need to re-edit your config.plist file manually to change CsrActiveConfig stettings to re-enable SIP security-(CsrActiveConfig=0x00 for max SIP -cause CsrActiveConfig=0x65 ain’t safe )–check post # 48 courtesy of Toleda explaining how and why to do this. These are just my suggestion and I stand to be corrected.
By the way guys Apple just realeased OS X El Capitan Developer Beta 6- if you have a developers account download and start testing –guess Public Beta 4 might not be far away (assuming Apple intends to release one before the official launch date of the final GM)
Happy hacking