I just ran into this problem -- Using Parallels Version 18.2.0 (53488) Business Edition on a host apple silicon MBP (Ventura 13.3). Apple ID works via the web, just not anywhere I need it (like in Xcode to add a Team so I can use certificates and profiles). Currently the only way to test some of the entitlements is to disable SIP -- something I don't have access to do on my production workstation. Note that this isn't a problem on a personal host Intel mac (also Ventura 13.3) -- I've got VMware Fusion Professional Version 13.0.1 (21139760) on it and the Ventura guest OS I've got running there has no problems using the apple ID anywhere. I had hoped maybe I could use VMware Fusion on the apple silicon host mac too, however VMWare has stated they do not plan to support macOS as a guest OS in Fusion: https://kb.vmware.com/s/article/88697?lang=en_US&queryTerm=88697 -- that and the current version has no way to spin up a macOS guest VM on that kind of host. If anyone comes up with a workaround for apple silicon host systems, please post here!

This is an ongoing issue. I believe Apple has a hard coded limit of 75% of physical memory. More on this here (fast forwarded to the relevant part) An example table of the limits here: This function will tell you how must you can actively use on your own machine Apple's solution is to break up the jobs, but apparently that's not an easy task with LLMs -- more on that here: There is a hack that lets you adjust the VRAM/RAM split, but it unfortunately requires keeping SIP disabled. Hopefully someone at Apple will find this and give us a means to adjust ourselves.