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Your Favourite Mac Support

Contact an independent IT expert.

Classic Communication Channels

Mobile: +49 151 400 69 699
Email:

Please note that requests from new customers will only be accepted by e-mail.

If you describe your technical problems in general (and leave your complete contact data), I will get back to you as soon as possible.

Please feel free to make an appointment for a telephone call to clarify further details in advance.

Additional Communication Tools

Threema: J63B5ZNZ
Signal: +49 151 40069699
Keybase: macmarcl


S/MIME secured E-Mail

If you are interested, you can download my current X.509 certificate for S/MIME secured e-mails here:

SHA1 fingerprint of my X.509 certificate (valid until 2022-02-06):

7F D7 AA 65 D0 9E 86 39 F4 51 2E DA B1 69 0D 08 D7 BA 57 42

The corresponding GlobalSign Intermediate Certificate can be found here:

SHA1 fingerprint of the "GlobalSign PersonalSign 1 CA - SHA256 - G3" certificate (valid until 2024-06-15):

5E C2 8E D7 9E 8C E8 5D 8F 84 CD 7A A7 B8 6D 73 B1 71 DE B9