- Jan 30, 2018
- i7 3720qm
- Mobile Phone
My system is T7500 with dual xeon X5675.
That sounds awesome. If you need some resources, please let me know. So far as I know, you are the first one who installed Catalina on the Dell T5500. Please keep update and wait for hearing more news from you. About sound drivers(appleHDA.kext ), probably, you need to roll back to 10.13.3.