Stuff at Fruit Co. Formerly OpenCore Legacy Patcher.
Joined July 2020
- Tweets 437
- Following 122
- Followers 5,070
- Likes 939
113 Photos and videos
I'm genuinely honored to have worked with Dhinak for so long, and super proud of how far you've come! Very excited to see what you do next at Apple!
I'm thrilled to announce that I'll be interning at Apple this summer, starting in a week!
To the friends I've made and the people I've learned from along the way: thank you. This wouldn't have happened without you.
dhinakg.github.io/2026/05/24…
2
24
2,835
Mykola Grymalyuk retweeted
Mar 16
I’m pumped to be joining the team! This is going to be a great adventure 🦾🤖🍎
We have some exciting news to share: @blacktop__ is joining Calif to work on a range of R&D projects focused on Apple and AI security.
If you work in the Apple security ecosystem, he’s already a household name. He’s the creator of:
* ipsw – the ubiquitous Apple firmware analysis tool: github.com/blacktop/ipsw
* darwin-xnu-build – reproducible XNU kernel builds: github.com/blacktop/darwin-x…
* ipsw-diffs – automated diffing of Apple releases: github.com/blacktop/ipsw-dif…
* The only public deep-dive on Apple’s Lockdown Mode: github.com/blacktop/presenta…
His tooling is so good that even Apple engineers use it. If you do reverse engineering, chances are you’ve touched his Rust headless IDA MCP server: github.com/blacktop/ida-mcp-….
People have literally collected CVEs and bug bounties just by digging through the diffs produced by his tools.
With @brucedang, @Little_34306 and now @blacktop__, we're building a serious Apple security force at Calif. We’ll have more announcements in this space soon!
If you're interested in Apple security, AI, automated bug discovery, reverse engineering, or hacking, we’re hiring: calif.io/jobs.
16
3
109
29,753
We have some exciting news to share: @blacktop__ is joining Calif to work on a range of R&D projects focused on Apple and AI security.
If you work in the Apple security ecosystem, he’s already a household name. He’s the creator of:
* ipsw – the ubiquitous Apple firmware analysis tool: github.com/blacktop/ipsw
* darwin-xnu-build – reproducible XNU kernel builds: github.com/blacktop/darwin-x…
* ipsw-diffs – automated diffing of Apple releases: github.com/blacktop/ipsw-dif…
* The only public deep-dive on Apple’s Lockdown Mode: github.com/blacktop/presenta…
His tooling is so good that even Apple engineers use it. If you do reverse engineering, chances are you’ve touched his Rust headless IDA MCP server: github.com/blacktop/ida-mcp-….
People have literally collected CVEs and bug bounties just by digging through the diffs produced by his tools.
With @brucedang, @Little_34306 and now @blacktop__, we're building a serious Apple security force at Calif. We’ll have more announcements in this space soon!
If you're interested in Apple security, AI, automated bug discovery, reverse engineering, or hacking, we’re hiring: calif.io/jobs.
5
24
232
33,603
Mykola Grymalyuk retweeted
Feb 26
🔺NEW: iPhone and iPad are now the first and only generally-available devices to meet the exacting security requirements for handling classified NATO information. apple.com/newsroom/2026/02/i…
18
95
344
47,272
Mykola Grymalyuk retweeted
Feb 11
Come take our training if you're around. Csaba and I have been working on delivering the best macOS vulnerability training we could
6
35
9,458
Mykola Grymalyuk retweeted
Jan 22
🔺New security-focused developer event on March 5 at Apple Park: featuring sessions on Memory Integrity Enforcement, new tools in Enhanced Security in Xcode, Apple’s defensive security engineering approach, Swift adoption in security-sensitive code, and how to apply all these techniques to protect apps. Sign up: developer.apple.com/events/v…
3
44
139
15,819
Mykola Grymalyuk retweeted
19 Dec 2025
🔺This is the first talk I've given in 6 years – featuring formal verification of post-quantum cryptography, the evolution of the Secure Page Table Monitor, a view into Memory Integrity Enforcement, updates to Apple Security Bounty… and a personal note.
19 Dec 2025
The collection is complete! 🎬 We just uploaded @radian's keynote to our YouTube channel
youtube.com/watch?v=Du8BbJg2…
4
49
210
60,703
Mykola Grymalyuk retweeted
15 Oct 2025
The slidedeck to our talk, Crash One: A Starbucks Story - CVE-2025-24277, with @gergely_kalman from @hexacon_fr and @objective_see #OBTS is available from the link below.
It was a macOS vulnerability impacting the crash reporting process where we could achieve LPE and sandbox escape.
theevilbit.github.io/talks_w…
1
25
88
10,892
Mykola Grymalyuk retweeted
10 Oct 2025
Very excited to see interesting Gatekeeper research!
security.apple.com/blog/appl…
1
5
17
2,086
Mykola Grymalyuk retweeted
10 Oct 2025
Apple's Real World CTF : you get the flag, you get the bounty
security.apple.com/blog/appl…
4
58
398
34,556
Mykola Grymalyuk retweeted
2 Oct 2025
Are you interested in bleeding-edge microarchitecture offensive security research, with a concrete impact on user security?
We have just opened a Microarchitecture Security Internship position at Apple, in SEAR LASER! ❤️🔥
Apply here: jobs.apple.com/en-us/details…
5
22
139
16,387
Mykola Grymalyuk retweeted
1 Oct 2025
The slides of my talk "The Evolution of macOS Security from the Desert to the Lake" @macsysadmin is up at my site:
theevilbit.github.io/talks_w…
2
34
103
9,613
Mykola Grymalyuk retweeted
19 Sep 2025
We’re thrilled and honored to reveal our second keynote speaker: Ivan Krstić (@radian)
Any guesses what he might talk about? 😉
2
21
63
11,133
Mykola Grymalyuk retweeted
15 Sep 2025
Got 10 CVEs and 4 Acks in macOS Tahoe release. Probably the most I ever got for a single release. 😎
Upgrade your devices.
support.apple.com/en-us/1251…
12
15
174
15,285
Mykola Grymalyuk retweeted
9 Sep 2025
🔺iPhone models announced today include Memory Integrity Enforcement, the culmination of an unprecedented design and engineering effort that we believe represents the most significant upgrade to memory safety in the history of consumer operating systems. security.apple.com/blog/memo…
54
484
2,669
378,258
3 Sep 2025
This year’s Security Researcher Device application is now open 🎉
security.apple.com/research-…
1
17
54
7,374
Mykola Grymalyuk retweeted
23 Jul 2025
Will be presenting my Hydroph0bia (CVE-2025-4275) research at OFFZONE (offzone.moscow) 2025 on Aug 21st.
It will be 1 hr long main track talk about UEFI SecureBoot, the hole Insyde left in the H2O platform for a decade, and the things we all can do to prevent such holes.
4
36
3,969
Mykola Grymalyuk retweeted
8 Jul 2025
Proud to announce that I’m interning at Apple this summer on the UIKit team!!
42
8
225
13,695
Mykola Grymalyuk retweeted
25 Jun 2025
Hello friends. Check out this awesome and unique role that just opened up on my team in SEAR. Wanna secure Apple silicon, ROMs, iBoot, and more? jobs.apple.com/en-us/details…
7
52
171
29,233