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 Do I have to install memory modules in pairs (2 or 4) on a Mac? What is ECC? Why can my memory be used when installed in a specific slot, but it won’t work if I change the slot Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started