Translated

If you buy a lot of Macbooks these days, it's hard to pick a suitable used model, right? So I have arranged a lineup that should be avoided if possible.

1. Macbook Pro Nonretina (2011-2012)
   Non-Retina refers to models that do not have retina display.
   The above model has Radeon external graphics card issues (HD 6490M, HD 6750M, HD 6770M) and is a time bomb that can be broken at any time if you are unlucky.
   In 2011, we used the Early 17 inch for 4 million won, but it was replaced with a new motherboard three times in total due to a problem with graphics, and eventually it was released at a low price.
   You can use gfxCardStatus which can be converted to built-in graphics, but the performance of HD Graphics 3000 is too high.
   A.png

2. The MacBook Pro (2 to 3 years old)
   2012-2015 MacBook Pro Retina Coatings are exfoliated, and the issue can be repaired free of charge within three years of purchase (full exchange of the top plate) (If the purchase date is March 2015, it will be available until March 2018. If it is February 2012, it will be available until October 16th.)
   When I was using the 13-inch early model in 2015, I was replaced at the Ilsan Yubei base by the symptoms of exfoliation.
   B.jpeg

3. Discharged Battery MacBook Pro
   I think that it is discharged and it can be used just by adapter, but if the rechargeable battery is not in the MacBook, the CPU will be forced to throttling and the computer will slow down a lot. Then you need to buy additional battery (10 ~ 200,000 won extra cost, of course, there are 50,000 won for ebay or ali wal.)

C.jpeg

1. 2010 MacBook Pro
   The 2010 MacBook Pro has a high clock speed, but due to the limitations of Arrandale, the speed difference is much worse than later generations (Sandy Bridge). Almost all the CPUs that are especially important for computing power are double. 4, 8, and 3 L3 cache at core 2, 3 or 4MB / s at 6, 8MB / s at twice, and system bus at 2.5 GT / s at 5 GT / s.
   Memory is also seen to have improved almost all the way from 1,066Mhz to 1,333.
   Furthermore, the internal input / output terminal, SATA, also changes dramatically from 2 to 3.

Once you have avoided the above model, you can actually have a limited model.

If each model comes out to be incredibly cheap, you will need the wisdom to use it for your personal use.

Please note that the beginner has written a list to avoid. :)