Screenshot example doesn't work on some MacOS

[freesig]

The screenshot example isn't working on some MacOS.
I works on my mac but not @MacTuitui
He is getting this validation error:

VUID-VkMappedMemoryRange-size-01390(ERROR / SPEC): msgNum: 0 - vkInvalidateMappedMemoryRanges: Size in pMemRanges[0] is 0x107ac0, which is not a multiple of VkPhysicalDeviceLimits::nonCoherentAtomSize (0x100). The Vulkan spec states: If size is not equal to VK_WHOLE_SIZE, size must either be a multiple of VkPhysicalDeviceLimits::nonCoherentAtomSize, or offset plus size must equal the size of memory. (https://www.khronos.org/registry/vulkan/specs/1.1-extensions/html/vkspec.html#VUID-VkMappedMemoryRange-size-01390)
    Objects: 1
        [0] 0x2d, type: 8, name: NULL
VUID-VkMappedMemoryRange-size-01390(ERROR / SPEC): msgNum: 0 - vkFlushMappedMemoryRanges: Size in pMemRanges[0] is 0x107ac0, which is not a multiple of VkPhysicalDeviceLimits::nonCoherentAtomSize (0x100). The Vulkan spec states: If size is not equal to VK_WHOLE_SIZE, size must either be a multiple of VkPhysicalDeviceLimits::nonCoherentAtomSize, or offset plus size must equal the size of memory. (https://www.khronos.org/registry/vulkan/specs/1.1-extensions/html/vkspec.html#VUID-VkMappedMemoryRange-size-01390)
    Objects: 1
        [0] 0x2d, type: 8, name: NULL

I'm not sure if this is related but it's worth ruling out.
It's probably the buffer size which is based on the screen dimensions that is causing this.

• Figure out what VkPhysicalDeviceLimits::nonCoherentAtomSize is on that machine
• See if running with dimensions that are a multiple of this number fixes the issue.
  Might be worth doing an api dump.

[freesig]

Ok I'm getting this exact same validation error on my mac but it's working fine.