What Is the Topcase (Upper Case)?
The top case is the aluminium upper body of the MacBook which carries the keyboard, the trackpad, the loudspeakers and, on most models, the battery. Since Apple has riveted the keyboard to this casing from 2016 onwards, replacing the keyboard on its own is not possible on most models; in the event of a keyboard fault the entire upper case is renewed.
When Is a Topcase Replacement Necessary?
- Butterfly keyboard failure: On 2016-2019 models, keys that stick, repeat or fail to register at all are the classic butterfly mechanism fault.
- Keyboard after liquid contact: Contact with coffee, water or tea permanently damages the keyboard matrix. In this case liquid damage repair is assessed in conjunction with this.
- Swollen battery + worn keyboard: If both are needed, a topcase replacement solves it in a single operation.
- Dented or bent casing: If the case is bent after a fall, the lid does not close properly and the trackpad click stops working correctly.
- Severely worn key markings: With heavy use the letters on the keys wear off; cosmetic, but annoying.
What Must Definitely Be Done Before The Replacement
1. Take a Backup
The drive is not touched during a topcase replacement, but we recommend that you make a Time Machine backup before any major work. If you wish, we can also make the backup for you.
2. Prepare Your Apple Account and Your Passwords
During the test phase the device may need to be started up and the keyboard and Touch ID verified. You need to know your lock screen password.
3. The Touch ID Question
The Touch ID sensor is paired with the logic board. During replacement the sensor must be transferred correctly; otherwise the fingerprint function will not work. This detail is overlooked in most places; we discuss it from the outset.
What Do You Gain After the Repair?
New Keyboard
Sticking keys and keys that register twice are a thing of the past. The key markings look like new.
New Battery
On models where the battery is part of the casing, battery life is reset as well.
New Trackpad
Click feel and gesture sensitivity return to factory condition.
A Proper Case
Bending and dents are eliminated, the lid closes flush.