How much space do you recommend on rMBP if you want to run Windows on a VM

Discussion in 'MacBook Pro' started by galaksy, Nov 15, 2014.

  1. galaksy macrumors 6502

    Apr 19, 2014
    I would like to run W7 or W8 on a VM and wondering how much GB I should allot for this.
  2. andeify macrumors 6502


    Jun 10, 2012
    It depends how much stuff you will put on Windows, I have 3 VMs running on my 256gb Mac Mini but they don't have many Apps, Programs or Games on. Altogether they take up about 60-70GB which is fine on 256GB. I'm getting a15" rMBP soon and it will have 512GB storage because I plan to put a lot more Apps on.
  3. snaky69 macrumors 603

    Mar 14, 2008
    Both parallels and VM ware allow you to have a virtual disk that grows and shrinks depending on how big your windows install is. You don't have to allocate it any space per se, but you do have to have a bit of space to install the VM in the first place.
  4. galaksy thread starter macrumors 6502

    Apr 19, 2014
    I have 256GB unfortunately.
    If I use 60GB for Windows how much should I leave out for Mac and how much for empty space so that the SDD isn't too full at any time?
  5. johngwheeler macrumors 6502

    Dec 30, 2010
    I come from a land down-under...
    This. But bear in mind that growing VM storage dynamically is slightly less performant that reserving it all up-front. Normally the convenience of not allocating all of your storage (particularly on a laptop SSD) far outweighs the minor performance difference.

    FYI, my Windows 7 Enterprise installation with some fairly heavyweight IDEs and Java middleware software uses about 60GB. The VM is based on a Bootcamp partition so you have to fix the partition size (& hence the VM disk size) when you install Bootcamp. I chose 80GB (close to 85 billion bytes on disk). You can use the free space in Bootcamp form Mac OS X if you have an NTFS extension such as Paragon or Tuxera. Next time I would choose 60-70GB for Windows 7 and try to keep the installation lean.

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