Can I use memory modules with 128GB capacity on Apple's Mac Pro late 2013? Category : Setup / Operation The late 2013 Apple Mac Pro supports up to 128GB of RAM. We suggest using Transcend JetMemory upgrade kit: TS128GJMA534P.Note that due to Intel's Xeon CPU limitation, the system will run at 1066Mhz when installed a quad rank memory module. Is the answer helpful? Related Why can my memory be used when installed in a specific slot, but it won’t work if I change the slot What types of memory modules can be used with Apple's Mac Pro late 2013? What is ECC? Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started