There is difference in the info about the Mac in apple website and “about this mac” from my Mac book

Odd, but that one digit difference will have no effect.

Crucial has a scan feature—out of curiosity you can see what it returns for RAM.

http://www.crucial.com/usa/en

or from the terminal app you can copy and paste this PERL script:

system_profiler SPHardwareDataType SPMemoryDataType | perl -ne '
     $SerialNumber = $1 if /Serial Number \S+:\s+(\S+)/;
      $Processors   = $1 if /Processors:\s+(\d+)/;
     $Speed        = $1 if /Processor Speed:\s+(.*)/;
     $Name         = $1 if /Processor Name:\s+(.*)/;
     $Memory       = $1 if /Memory:\s+(\d+\s+\S+)/;
     $Phase2       = 1  if /Memory:\s*$/;
     $MemSpeed     = $1 if $Phase2 && /Speed:\s+(\d+\s+\S+)/;
     $Type         = $1 if $Phase2 && /Type:\s+(.*)/;
     END { printf("%s\n%s x %s %s\n%s %s %s\n",
                  $SerialNumber,
                  $Processors, $Speed, $Name,
                  $Memory, $MemSpeed, $Type);
         }
'

(please note this includes that last comma at the end.)

it will return :

Serial number (do not post this personal info)

processor

RAM

There is no problem. The RAM speed is actually 2666.6666666666mHz, and sometimes referred to as 2666, sometimes 2667.

stedman1 wrote:

There is no problem. The RAM speed is actually 2666.6666666666mHz, and sometimes referred to as 2666, sometimes 2667.

Thanks stedman1—very insightful post.

If in doubt, roundup 😚

👍🏻.

toroso wrote:

Do I need to go to apple store for this problem?

What was your conclusion toroso —did this resolve your issue?