2020. 3. 18. 19:37ㆍ카테고리 없음
Due to advanced security features of the, iMac Pro and 2018 MacBook Pro models must pass Apple diagnostics for certain repairs to be completed, according to an internal document from Apple obtained by MacRumors. For the 2018 MacBook Pro, the requirement applies to repairs involving the display, logic board, Touch ID, and top case, which includes the keyboard, battery, trackpad, and speakers, according to the document. For the iMac Pro, the requirement only applies to logic board and flash storage repairs. If any of these parts are repaired in an iMac Pro or 2018 MacBook Pro, and the Apple diagnostics are not run, this will result in an inoperative system and an incomplete repair, according to Apple's directive to service providers.
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- Possible Chance Of Controller Support For Mac Pro
- Possible Chance Of Controller Support For Macbook
Apple's diagnostic suite is limited to internal use by Apple Stores and Apple Authorized Service Providers, as part of what is called the Apple Service Toolkit. As a result, independent repair shops without Apple certification may be unable to repair certain parts on the iMac Pro and 2018 MacBook Pro. Moreover, when the iMac Pro and 2018 MacBook Pro are eventually classified as vintage products, meaning they are no longer eligible for hardware service from Apple, repairs through alternative channels might not be possible. MacRumors has reached out to Apple for comment.
This requirement is a result of the T2 chip, which integrates several previously separate components, including the system management controller, image signal processor, audio controller, and SSD controller. It also features a Secure Enclave coprocessor for secure boot, encrypted storage, and authenticating Touch ID.
To initiate a Mac repair, visit the on Apple.com. Update: Despite the specific wording of Apple's document, which says failure to run Apple diagnostics after certain parts are replaced in T2-equipped Macs 'will result in an inoperative system,' the repair experts at, and it remained operational without passing diagnostics. IFixit is not an Apple Authorized Service Provider, so at this time, it appears that independent repair shops should be able to repair the iMac Pro and 2018 MacBook Pro without issue. It's unclear why Apple's document suggests otherwise. I have spent 3500 EUR on a 13 inch MBP that is not as fast as a Dell XPS that costs 1/2 as much.
The storage is not upgradable. The memory is not upgradeable.
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Everything is glued together inside the case - if anything breaks I might as well throw away the laptop and buy a new one. Now compare to my previous laptop - a 2011 MacBook pro. Everything was upgradeable. I bought it with 4GB RAM and upgrade to 16. It came with 256GB hard disk - I upgraded to a 1TB SSD.
I replaced the keyboard when I spilt liquid on it - it cost 30 EUR in parts and I fitted it following an ifixit guide. Look at where we are!! Out of principle, I honestly don't think my next laptop will be a Mac.
It's possible for two hosts to have the same MAC, due to spoofing, a mistake during manufacturing, or willful negligence on the part of the manufacturer. So, 1) In general, an Ethernet switch keeps a table of which MAC addresses are attached to which ports. It bases this table on the source address of frames it receives during the normal operation of the network. Upon receiving any frame, the source MAC is read and compared with the current switching table, and then added alongside whichever switchport it was received on. So if there are two hosts, both with the same MAC address, then the switch will update it's MAC table every time it receives a frame from either host. The reachability of either host will flap on and off and be inconsistent. 2) Short answer: no.
Duplicate MAC addresses will not trigger any sort of security problem in an unmanaged switch (a switch without configuration software), or a managed switch (like most Cisco/HP/Junipers) that has not been configured for port security. Managed switches will give you a warning printed in the console terminal if they detect a duplicate MAC (a MAC that 'exists' on multiple switchports), but by default they won't 'do anything' about it AFAIK. If you want to use port security options on a managed switch, you can do stuff like only allow 1 MAC address per switchport. The MAC address will be learned dynamically by the switch (like it usually learns MACs), but the difference is that once it is learned, it is bound to that switchport. Then, if the switch receives frames from a duplicate MAC on another switchport, it can place that port into a disabled state (shut it down.) You mentioned deauthentication in your question. The port security feature of some switches is different that 'deauthentication'- it is deauthorization.
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They are similar but the difference is important; look up authentication vs. 3) Duplicate MACs will not cause collisions. Collisions are the result of a shared electrical bus. It is more of a race condition, although I haven't heard it referred to like that before.
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Remember, duplicate MACs are 'allowed', as far as any out-of-the-box Ethernet switch is concerned- they just cause a problem that will interrupt network connectivity to each host in question. The problem is a constantly changing switching table. Answers to your question:. YES it is possible, and NO you'll not have consistent contact. You might.the administrator might see the problem and disable the ports on the switch.
What I encountered was with two systems with the same MAC address connected to the same switch, and what I noticed was that networking would work with the LAST system to send out ethernet packets being selected. So it was when one system worked the other one didn't.quite amusing and puzzling to me until the networking guy pointed out the problem.