Both issues can be worked around on the MacPro's. They built in obsolescence in two areas one the EFI, the second graphics cards. Apple sold these as "Fully" 64-bit machines, when in fact they were limited by the EFI used, when confronted Apple downplayed it. (those mac's would boot thru the 32-bit EFI, and run the 64-bit kernal). there was some overlap with the OS X versions, the late 10.4.x thru 10.7.5 works with early intel mac's 32-bit EFI, but otherwise 64-bit systems. iso available for download? gives a similar explanation: This is for older Apple computers.Īnd finally this Kubuntu support thread Why is there no longer a +mac. Be sure you download the iso which does NOT have ‘+mac’ in the filename. This blog From an Egg > How to install Ubuntu on a Mac or Macbook also suggests using the standard iso files.ĭownload Ubuntu 14.04 LTS Trusty Tahr. (In fact, the name amd64+mac is a slight misnomer, because it later turned out that some systems other than Macs suffer from a similar problem - but I felt that a more technically accurate naming such as amd64+nouefi would be more likely to confuse than enlighten.)
Macs are happy to boot these in their BIOS emulation mode. I therefore created the amd64+mac CD images, which are exactly the same as the amd64 images except that they only support BIOS booting. This left us in rather a quandary: we needed to support UEFI systems, but we didn't want to drop support for Macs either. Unfortunately, even though Macs use a variant of EFI (an earlier version of what's now called UEFI), they apparently can't cope with multi-catalog CDs, and simply refuse to boot them. This was done using a technique known as a "multi-catalog" CD - it contains two boot images, and the specification says that the firmware is supposed to pick the one it can best use. In Ubuntu 10.10, we changed the normal amd64 CD images to dual-boot on either BIOS or UEFI systems (UEFI, "Unified Extensible Firmware Interface", is a different kind of firmware found on many newer systems). See response to: What is different about the Mac ISO image? iso files existed for saucy ( /saucy), but do not appear to to exist for trusty ( /trusty).ĭid the Mac specific elements get merged with the standard 32 and 64bit versions?
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