Question 1

Hardware Overview:
Will this memory fit my early 2008 MacBook Pro computer below?

Model Name:MacBook Pro
  Model Identifier:MacBookPro4,1
  Processor Name:Intel Core 2 Duo
  Processor Speed:2.5 GHz
  Number of Processors:1
  Total Number of Cores:2
  L2 Cache:6 MB
  Memory:4 GB
  Bus Speed:800 MHz
  Boot ROM Version:MBP41.00C1.B03
  SMC Version (system):1.27f3
  Serial Number (system):W8828165YJY
  Hardware UUID:950D2065-1541-56E8-BF31-CE54306F1F93
  Sudden Motion Sensor:
  State:Enabled

Accepted Answer

No. Your system takes PC2-5300 DDR2 | Min. RAM Speed: 667 MHz

Maximum RAM:6 GB - *Apple officially supports a maximum of 4 GB of RAM but third-parties have been able to upgrade the system to 6 GB of RAM using one 2 GB and one 4 GB memory module.

Check EveryMac for more details on your model.

Question 2

Is this compatible with mac mini mid-2011?

Accepted Answer

That Mac along with my fathers iMac take SODIMM (small outline dual inline memory module). As long as it is PC3 10600 and 1333 Mhz it will work for your mid 2011 Mac Mini.

Question 3

Is this item compatible with imac 27.5 mid 2011 version?

Accepted Answer

Yes

Brand	Crucial
Model	CT4G3S1339M
Type	204-Pin DDR3 SO-DIMM

Compatibility	For Apple Notebook
Capacity	4GB
Speed	DDR3 1333 (PC3 10600)
CAS Latency	9
Voltage	1.35V/1.5V

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Crucial 4GB DDR3 1333 (PC3 10600) Memory for Apple Model CT4G3S1339M

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Item#: 9SIAE9AKF15452